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Fraction as division

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5102535
Every fraction can be understood as a quotient. Consider \(\frac{5}{13}\). a) Which number is the dividend? b) Which number is the divisor? c) Write the fraction as a division expression.

Hints

- Think about the roles of the numerator and denominator in division. - A fraction bar can be read as a division symbol. - Identify which number is divided and which number it is divided by.

Solution

1. The numerator is the dividend, so the dividend is \(5\). 2. The denominator is the divisor, so the divisor is \(13\). 3. Therefore, \(\frac{5}{13}=5\div13\).

Answer

a) \(5\) b) \(13\) c) \(5\div13\)
5544445
The bars in the model are shared equally among \(4\) hikers. How much of one whole bar does each hiker receive? Write the situation as a division expression and as a fraction.
Figure for problem 554444

Hints

- Count the number of whole bars shown in the model. - The number of hikers tells how many equal shares are made. - Read the quotient as a fraction with the amount being shared on top and the number of shares on the bottom.

Solution

1. The model shows \(3\) whole bars being shared among \(4\) hikers, so the division expression is \(3\div4\). 2. A quotient of whole numbers can be written as a fraction: \(3\div4=\frac{3}{4}\). 3. Each hiker receives \(\frac{3}{4}\) of one whole bar.

Answer

\(3\div4=\frac{3}{4}\). Each hiker receives \(\frac{3}{4}\) of one whole bar.
5102505
Write each quotient as a fraction and simplify. Write a whole-number result as a whole number. a) \(12\div15\) b) \(45\div20\) c) \(132\div11\) d) \(14\div42\) e) \(75\div100\)

Hints

- Read the fraction bar as division. - Find a number that divides both the dividend and divisor. - A quotient is a whole number only when the division has no remainder. - Use the greatest common factor to simplify in one step.

Solution

1. A quotient \(a\div b\) can be written as \(\frac{a}{b}\). 2. Simplify each fraction by dividing the numerator and denominator by a common factor. 3. The results are \(\frac{12}{15}=\frac{4}{5}\), \(\frac{45}{20}=\frac{9}{4}\), \(\frac{132}{11}=12\), \(\frac{14}{42}=\frac{1}{3}\), and \(\frac{75}{100}=\frac{3}{4}\).

Answer

a) \(\frac{4}{5}\) b) \(\frac{9}{4}\) c) \(12\) d) \(\frac{1}{3}\) e) \(\frac{3}{4}\)
5102545
Lucas says, “When two numbers are divided, it does not matter which number is the dividend and which is the divisor.” Test his claim using \(3\) and \(4\). a) Write the quotient as a fraction when \(3\) is the dividend and \(4\) is the divisor. b) Write the quotient as a fraction when \(4\) is the dividend and \(3\) is the divisor. c) Compare the fractions. Is Lucas correct? Explain.

Hints

- Think about sharing \(3\) pizzas among \(4\) children versus sharing \(4\) pizzas among \(3\) children. - Write both situations as fractions. - Decide what happens when the numerator and denominator are switched.

Solution

1. When \(3\) is the dividend and \(4\) is the divisor, the quotient is \(\frac{3}{4}\). 2. When \(4\) is the dividend and \(3\) is the divisor, the quotient is \(\frac{4}{3}\). 3. The fraction \(\frac{3}{4}\) is less than \(1\), while \(\frac{4}{3}\) is greater than \(1\). The quotients are different, so Lucas is not correct.

Answer

a) \(\frac{3}{4}\) b) \(\frac{4}{3}\) c) No. \(\frac{3}{4}<1\), while \(\frac{4}{3}>1\), so changing the order changes the quotient.
5102555
The contents of \(7\) equal bags of flour are divided evenly among \(10\) storage bins. a) In this situation, are the \(7\) bagfuls the dividend or the divisor? b) Are the \(10\) bins the dividend or the divisor? c) Write the amount of flour in each bin, measured in bagfuls, as a division expression and as a fraction.

Hints

- Identify the total amount being shared and the number of equal groups. - The amount being divided appears first in the division expression. - Connect the dividend and divisor to the numerator and denominator.

Solution

1. The \(7\) bagfuls are the amount being divided, so \(7\) is the dividend. 2. The \(10\) bins show how many equal groups are made, so \(10\) is the divisor. 3. The division expression is \(7\div10\), and each bin receives \(\frac{7}{10}\) of a bagful.

Answer

a) Dividend b) Divisor c) \(7\div10=\frac{7}{10}\) of a bagful
5102655
Write each improper fraction as a mixed number in simplest form: a) \(\frac{26}{4}\) b) \(\frac{50}{12}\) c) \(\frac{108}{15}\)

Hints

- Divide the numerator by the denominator. - Use the quotient as the whole-number part and the remainder as the new numerator. - Simplify the fractional part.

Solution

1. For \(\frac{26}{4}\), divide: \(26\div4=6\) remainder \(2\). Thus, \(\frac{26}{4}=6\frac{2}{4}=6\frac{1}{2}\). 2. For \(\frac{50}{12}\), divide: \(50\div12=4\) remainder \(2\). Thus, \(\frac{50}{12}=4\frac{2}{12}=4\frac{1}{6}\). 3. For \(\frac{108}{15}\), divide: \(108\div15=7\) remainder \(3\). Thus, \(\frac{108}{15}=7\frac{3}{15}=7\frac{1}{5}\).

Answer

a) \(6\frac{1}{2}\) b) \(4\frac{1}{6}\) c) \(7\frac{1}{5}\)
5102675
Interpret each fraction as a division result. Find \(x\) by stating the whole-number quotient and remainder when \(x\) is divided by the denominator. a) \(\frac{x}{7}=5\frac{3}{7}\) b) \(8\frac{4}{9}=\frac{x}{9}\)

Hints

- Read \(\frac{x}{b}\) as \(x\div b\). - In a mixed quotient, the whole-number part is the quotient and the fractional numerator is the remainder when the denominator is the divisor. - Rebuild the dividend from divisor, quotient, and remainder.

Solution

1. For a), \(\frac{x}{7}\) means \(x\div7\). The mixed number says the quotient is \(5\) with remainder \(3\), so \(x=5\times7+3=38\). 2. For b), \(\frac{x}{9}\) means \(x\div9\). The quotient is \(8\) with remainder \(4\), so \(x=8\times9+4=76\).

Answer

a) \(38\div7=5\) remainder \(3\), so \(x=38\). b) \(76\div9=8\) remainder \(4\), so \(x=76\).
5102895
Find each person’s or object’s share. Write the result as a fraction in simplest form. If the share is greater than \(1\), also write it as a mixed number. a) \(12\) pizzas are shared equally among \(16\) people. b) \(14\) quarts of juice are poured equally into \(20\) pitchers. c) A \(21\)-foot rope is cut into \(6\) equal pieces.

Hints

- Write each sharing situation as a fraction. - Divide the numerator and denominator by a common factor. - When the numerator is greater than the denominator, divide to write a mixed number.

Solution

1. For a), each person receives \(\frac{12}{16}=\frac{3}{4}\) of a pizza. 2. For b), each pitcher receives \(\frac{14}{20}=\frac{7}{10}\) quart. 3. For c), each piece is \(\frac{21}{6}=\frac{7}{2}=3\frac{1}{2}\) feet long.

Answer

a) \(\frac{3}{4}\) of a pizza b) \(\frac{7}{10}\) quart c) \(\frac{7}{2}\) feet, or \(3\frac{1}{2}\) feet
5102985
A loop around a lake is exactly \(12\) miles long. The Miller family bikes \(30\) miles, while a training group bikes \(50\) miles. How many lake loops does each group complete? Write each result as a mixed number in simplest form.

Hints

- Divide each total distance by \(12\) miles per loop. - A fraction bar represents division. - Simplify before writing the result as a mixed number.

Solution

1. For the Miller family, divide the total distance by the loop length: \(\frac{30}{12}=\frac{5}{2}=2\frac{1}{2}\). 2. For the training group, \(\frac{50}{12}=\frac{25}{6}=4\frac{1}{6}\).

Answer

The Miller family completes \(2\frac{1}{2}\) loops. The training group completes \(4\frac{1}{6}\) loops.
5355935
Three children share two same-size pizzas equally. What fraction of one whole pizza does each child receive?
Figure for problem 535593

Hints

- Imagine cutting each pizza into \(3\) equal pieces. - Count how many one-third pieces each child receives. - A fraction bar represents division.

Solution

1. Two whole pizzas are divided among \(3\) children. 2. Write the sharing as \(2\div3\). 3. Since \(2\div3=\frac{2}{3}\), each child receives \(\frac{2}{3}\) of a pizza.

Answer

Each child receives \(\frac{2}{3}\) of a pizza.
5408755
Yara says, “\(4\frac{2}{7}\) cannot be written as the quotient of two whole numbers because it is a mixed number.” Show that the claim is false by writing \(4\frac{2}{7}\) as an improper fraction and then as a division expression.

Hints

- First count how many sevenths are in the whole-number part and the fractional part together. - Then read the fraction bar as a division symbol.

Solution

1. Convert the mixed number: \(4\frac{2}{7}=\frac{4\times7+2}{7}=\frac{30}{7}\). 2. A fraction represents division, so \(\frac{30}{7}=30\div7\).

Answer

\(4\frac{2}{7}=\frac{30}{7}=30\div7\).
5408965
An \(11\)-yard strip of fabric is divided equally among \(4\) hallway displays. Write each display's share as a division expression, an improper fraction, and a mixed number.

Hints

- Put the total amount in the dividend position and the number of equal shares in the divisor position. - Read the quotient as a fraction, then use the remainder to form a mixed number.

Solution

1. Equal sharing gives \(11\div4\). 2. As a fraction, \(11\div4=\frac{11}{4}\). 3. Since \(11=2\times4+3\), \(\frac{11}{4}=2\frac{3}{4}\).

Answer

Each display gets \(11\div4=\frac{11}{4}=2\frac{3}{4}\) yards.
5409595
A ceramics class has \(13\) pounds of clay for \(6\) identical sculptures. The clay is shared equally. a) Write the amount of clay per sculpture as a division expression and as an exact fraction of a pound. b) Keep the exact share in fraction form and use nearby multiples of \(6\) to show that it lies between \(2\) and \(3\) pounds. c) Explain what the numerator and denominator of the fraction mean in this sharing situation.

Hints

- Equal sharing tells you which quantity is the dividend and which is the divisor. - To locate the quotient between whole numbers, compare the dividend with nearby multiples of the divisor. - Interpret the two numbers in the fraction using the original sharing situation.

Solution

1. Equal sharing gives \(13\div6=\frac{13}{6}\) pound per sculpture. 2. Since \(2\times6=12<13<18=3\times6\), dividing all three quantities by \(6\) gives \(2<\frac{13}{6}<3\). 3. The numerator \(13\) records the total pounds of clay, and the denominator \(6\) records the number of equal sculptures receiving shares.

Answer

a) \(13\div6=\frac{13}{6}\) pound per sculpture. b) \(2<\frac{13}{6}<3\), because \(12<13<18\) and \(12=2\times6\), \(18=3\times6\). c) \(13\) is the total pounds shared, and \(6\) is the number of equal shares.
5409915
Which fraction represents the quotient \(17\div5\): \(\frac{17}{5}\) or \(\frac{5}{17}\)? Explain how the positions of dividend and divisor determine the fraction, then write the correct quotient as a mixed number.

Hints

- Read a fraction bar as division from numerator to denominator. - Keep the order of the original division expression when writing the fraction. - Use the whole-number quotient and remainder to form a mixed number.

Solution

1. A fraction \(\frac{a}{b}\) represents \(a\div b\), so \(17\div5=\frac{17}{5}\). 2. The numerator is the dividend \(17\), and the denominator is the divisor \(5\). 3. Since \(17=3\times5+2\), \(\frac{17}{5}=3\frac{2}{5}\).

Answer

\(17\div5=\frac{17}{5}=3\frac{2}{5}\). The dividend \(17\) becomes the numerator and the divisor \(5\) becomes the denominator, so reversing them would represent a different quotient.
5410445
Long division gives \(23\div6=3\) remainder \(5\). Explain how that result becomes the exact fraction \(\frac{23}{6}\) and the mixed number \(3\frac{5}{6}\). What does the denominator \(6\) mean in the fractional part?

Hints

- A fraction bar can represent the original division exactly. - Think about what the remainder represents relative to the divisor. - The divisor determines the denominator of the leftover fractional part.

Solution

1. The division \(23\div6\) is represented exactly by \(\frac{23}{6}\). 2. The quotient \(3\) accounts for \(18\) of the \(23\), leaving remainder \(5\). 3. The remainder \(5\) is five parts of size \(\frac{1}{6}\), so it becomes \(\frac{5}{6}\). 4. Therefore \(\frac{23}{6}=3\frac{5}{6}\).

Answer

\(23\div6=\frac{23}{6}=3\frac{5}{6}\). The denominator \(6\) shows the size of the equal parts left after forming whole groups.
5410945
Write \(41\div6\) as an exact fraction and as a mixed number. Explain how the remainder from whole-number division appears in the mixed number.

Hints

- A fraction bar can represent division exactly. - Use whole-number division to find the quotient and remainder. - The remainder is measured in parts whose denominator is the divisor.

Solution

1. The exact quotient is \(\frac{41}{6}\). 2. Whole-number division gives \(41=6\times6+5\). 3. The quotient \(6\) becomes the whole-number part, and the remainder \(5\) becomes \(\frac{5}{6}\). 4. Therefore \(\frac{41}{6}=6\frac{5}{6}\).

Answer

\(41\div6=\frac{41}{6}=6\frac{5}{6}\). In \(41=6\times6+5\), the whole-number quotient \(6\) becomes the whole part and the remainder \(5\) becomes \(\frac{5}{6}\).
5411045
Write \(18\div7\) as an exact fraction. a) Explain why the dividend becomes the numerator and the divisor becomes the denominator. b) Keep the exact quotient in fraction form and use multiples of \(7\) to determine the two consecutive whole numbers between which it lies.

Hints

- Read the fraction bar as a division bar: identify which number is being divided and which number gives the equal-share count. - Compare \(18\) with nearby multiples of \(7\) rather than converting the quotient to another number form. - Use those multiples to bound the exact fractional quotient.

Solution

1. The quotient \(18\div7\) is \(\frac{18}{7}\): \(18\) is the amount being divided, so it is the numerator, and \(7\) is the number of equal shares, so it is the denominator. 2. Since \(14=2\times7<18<3\times7=21\), dividing by \(7\) gives \(2<\frac{18}{7}<3\).

Answer

a) \(18\div7=\frac{18}{7}\); the dividend \(18\) is the numerator and the divisor \(7\) is the denominator. b) The quotient lies between \(2\) and \(3\).
5544455
The model shows whole loaves partitioned into thirds to help with equal sharing. The loaves are shared equally among \(3\) tables. Write the quotient as a division expression, an improper fraction, and a mixed number.
Figure for problem 554445

Hints

- Count the whole loaves in the model and identify the number of equal shares. - Write the dividend over the divisor to express the quotient as a fraction. - Use the thirds in the picture to see how many complete wholes and leftover thirds each share represents.

Solution

1. The model shows \(5\) whole loaves shared among \(3\) tables, so the division is \(5\div3\). 2. As a fraction, \(5\div3=\frac{5}{3}\). 3. Five thirds make \(1\) whole and \(2\) thirds, so \(\frac{5}{3}=1\frac{2}{3}\).

Answer

\(5\div3=\frac{5}{3}=1\frac{2}{3}\).
5544465
Together, the shaded bars show the exact result of a whole-number division. Which expression matches the model: \(9\div5\) or \(5\div9\)? Write the modeled value as an improper fraction and a mixed number, and explain how the model fixes the order of the division.
Figure for problem 554446

Hints

- Combine the shaded fifths across both bars. - Express that total number of fifths as one fraction before choosing the division expression. - Compare the size of the pictured value with what the reversed fraction would represent.

Solution

1. One full bar is \(\frac{5}{5}\), and the second bar shows \(\frac{4}{5}\), so the modeled value is \(\frac{9}{5}=1\frac{4}{5}\). 2. A fraction \(\frac{9}{5}\) represents \(9\div5\), so that is the matching expression. 3. The \(9\) counts the total fifths represented, while \(5\) tells how many fifths make one whole; reversing them would give \(\frac{5}{9}\), a value less than one and unlike the model.

Answer

The model matches \(9\div5\). Its value is \(\frac{9}{5}=1\frac{4}{5}\). The total number of fifths becomes the dividend/numerator, and the number of fifths in one whole becomes the divisor/denominator.
5544585
In each model, the filled pieces are one person's share after whole bars are shared equally. a) For model a), determine the number of wholes shared and the number of people, then write the share as a division expression and a fraction. b) Do the same for model b). c) Explain why the two shares are equal even though both whole-number quantities changed.
Figure for problem 554458

Hints

- Count the whole bars and the equal parts in each whole directly from each model. - In an equal-sharing model, the number of parts per whole matches the number of recipients. - Compare the two quotient fractions after you have read both situations from the images.

Solution

1. Model a) has \(2\) wholes divided into \(3\) equal recipient-parts per whole. One person receives one part from each whole, so the share is \(2\div3=\frac{2}{3}\). 2. Model b) has \(4\) wholes divided into \(6\) equal recipient-parts per whole. One person receives one part from each whole, so the share is \(4\div6=\frac{4}{6}=\frac{2}{3}\). 3. Doubling both the total number of wholes and the number of equal recipients doubles numerator and denominator of the fraction, so the amount per person is unchanged.

Answer

a) \(2\div3=\frac{2}{3}\) b) \(4\div6=\frac{4}{6}=\frac{2}{3}\) c) The shares are equal because both the total and the number of recipients were multiplied by \(2\), giving equivalent fractions.
5544595
The filled part of the model is one child's equal share. The same share was received by each of \(5\) children. a) What fraction of one whole bar did each child receive? b) How many whole bars were shared in all? c) Write the whole-number division expression whose quotient is the share shown, and explain how the fraction records the dividend and divisor.
Figure for problem 554459

Hints

- Read the individual share from shaded parts over total equal parts in the model. - Recombine five identical shares to recover the whole amount that was divided. - In the final division expression, identify which number is the total and which number is the number of equal shares.

Solution

1. The model has \(3\) of \(5\) equal parts filled, so each child received \(\frac{3}{5}\) of a bar. 2. Five children each receiving \(\frac{3}{5}\) of a bar use \(5\times\frac{3}{5}=3\) whole bars in all. 3. Therefore the sharing situation is \(3\div5=\frac{3}{5}\). The total number of bars is the dividend and becomes the numerator; the number of equal shares is the divisor and becomes the denominator.

Answer

a) \(\frac{3}{5}\) of a bar b) \(3\) whole bars c) \(3\div5=\frac{3}{5}\). The dividend \(3\) is the numerator and the divisor \(5\) is the denominator.
5102515
Consider these five quotients: \(A=15\div10\), \(B=24\div16\), \(C=6\div4\), \(D=18\div15\), and \(E=12\div10\). Which quotients have the same value when written as fractions in simplest form? Sort them into groups.

Hints

- Write each quotient as a fraction and simplify it. - Record the simplified fractions so you can compare them. - Make sure every fraction is in simplest form before grouping.

Solution

1. Write and simplify each quotient: \(A=\frac{15}{10}=\frac{3}{2}\), \(B=\frac{24}{16}=\frac{3}{2}\), and \(C=\frac{6}{4}=\frac{3}{2}\). 2. Also, \(D=\frac{18}{15}=\frac{6}{5}\) and \(E=\frac{12}{10}=\frac{6}{5}\). 3. Therefore, \(A\), \(B\), and \(C\) form one group, while \(D\) and \(E\) form the other.

Answer

Group 1: \(A\), \(B\), and \(C\), each equal to \(\frac{3}{2}\) Group 2: \(D\) and \(E\), each equal to \(\frac{6}{5}\)
5102715
Write each quotient as a fraction in simplest form. Also write each improper fraction as a mixed number, and write any whole-number result as a whole number. a) \(210\div45\) b) \(444\div24\) c) \(1005\div15\)

Hints

- Write each division expression as a fraction. - Divide the numerator and denominator by a common factor. - For an improper fraction, divide the numerator by the denominator. - A remainder of \(0\) gives a whole-number result.

Solution

1. Write \(210\div45\) as \(\frac{210}{45}\). Simplifying by \(15\) gives \(\frac{14}{3}=4\frac{2}{3}\). 2. Write \(444\div24\) as \(\frac{444}{24}\). Simplifying by \(12\) gives \(\frac{37}{2}=18\frac{1}{2}\). 3. Write \(1005\div15\) as \(\frac{1005}{15}\). Simplifying by \(15\) gives \(67\).

Answer

a) \(\frac{14}{3}=4\frac{2}{3}\) b) \(\frac{37}{2}=18\frac{1}{2}\) c) \(67\)
5102765
Use whole-number division with remainders to find the missing values. Do not use a mixed-number conversion rule without explaining the division. a) \(6\frac{x}{7}=\frac{46}{7}\) b) \(y\frac{2}{3}=\frac{23}{3}\)

Hints

- Read an improper fraction as numerator divided by denominator. - Find the whole-number quotient and remainder for each division. - Match those two pieces to the whole-number part and fractional numerator of the mixed number.

Solution

1. \(\frac{46}{7}\) means \(46\div7\). Since \(46=6\times7+4\), the quotient is \(6\) with remainder \(4\), so \(x=4\). 2. \(\frac{23}{3}\) means \(23\div3\). Since \(23=7\times3+2\), the quotient is \(7\) with remainder \(2\), so \(y=7\).

Answer

a) \(46\div7=6\) remainder \(4\), so \(x=4\). b) \(23\div3=7\) remainder \(2\), so \(y=7\).
5102815
Find each missing numerator or denominator. a) \(7\frac{2}{9}=\frac{\square}{9}\) b) \(\frac{53}{6}=8\frac{\square}{6}\) c) \(11\frac{3}{4}=\frac{47}{\square}\)

Hints

- Think about how a mixed number and an improper fraction represent the same value. - Multiply the whole number by the denominator, then add the numerator. - Use division with a remainder to convert an improper fraction. - The denominator stays the same when the form changes.

Solution

1. For a), \(7\times9+2=65\), so the missing numerator is \(65\). 2. For b), \(53\div6=8\) remainder \(5\), so the missing numerator is \(5\). 3. For c), \(11\times4+3=47\). The denominator remains \(4\), so the missing denominator is \(4\).

Answer

a) \(65\) b) \(5\) c) \(4\)
5102905
Two groups share pizzas equally. Group A: \(5\) pizzas are shared among \(8\) children. Group B: \(3\) pizzas are shared among \(5\) children. In which group does each child receive more pizza? Write and compare the shares as fractions.

Hints

- Write the amount per child as a fraction for each group. - Rewrite the fractions with a common denominator. - Find a common multiple of \(8\) and \(5\).

Solution

1. In Group A, each child receives \(\frac{5}{8}\) of a pizza. 2. In Group B, each child receives \(\frac{3}{5}\) of a pizza. 3. Use denominator \(40\): \(\frac{5}{8}=\frac{25}{40}\) and \(\frac{3}{5}=\frac{24}{40}\). 4. Since \(\frac{25}{40}>\frac{24}{40}\), each child in Group A receives more pizza.

Answer

Group A, because \(\frac{5}{8}>\frac{3}{5}\).
5102955
Convert each improper fraction to a mixed number. Then find how much must be added to reach the next whole number. a) \(\frac{19}{3}\) b) \(\frac{55}{8}\) c) \(\frac{113}{15}\)

Hints

- Divide the numerator by the denominator. - Use the remainder as the numerator of the fractional part. - Find the fraction that completes the fractional part to \(1\).

Solution

1. For a), \(19\div3=6\) remainder \(1\), so \(\frac{19}{3}=6\frac{1}{3}\). The next whole number is \(7\), and \(1-\frac{1}{3}=\frac{2}{3}\). 2. For b), \(55\div8=6\) remainder \(7\), so \(\frac{55}{8}=6\frac{7}{8}\). The next whole number is \(7\), and \(1-\frac{7}{8}=\frac{1}{8}\). 3. For c), \(113\div15=7\) remainder \(8\), so \(\frac{113}{15}=7\frac{8}{15}\). The next whole number is \(8\), and \(1-\frac{8}{15}=\frac{7}{15}\).

Answer

a) \(6\frac{1}{3}\); add \(\frac{2}{3}\) to reach \(7\). b) \(6\frac{7}{8}\); add \(\frac{1}{8}\) to reach \(7\). c) \(7\frac{8}{15}\); add \(\frac{7}{15}\) to reach \(8\).
5102975
A value \(\frac{x}{11}\) is \(\frac{5}{11}\) less than the next whole number, \(10\). a) Find the mixed-number value of \(\frac{x}{11}\). b) Interpret \(\frac{x}{11}\) as \(x\div11\). State the whole-number quotient and remainder, then find \(x\).

Hints

- First find the fraction that complements \(\frac{5}{11}\) to one whole. - Read \(\frac{x}{11}\) as \(x\div11\). - Use divisor, quotient, and remainder to reconstruct the dividend.

Solution

1. The value is between \(9\) and \(10\). Its fractional part is \(1-\frac{5}{11}=\frac{6}{11}\), so \(\frac{x}{11}=9\frac{6}{11}\). 2. Interpreting this as division, \(x\div11\) has quotient \(9\) and remainder \(6\). 3. Therefore \(x=9\times11+6=105\).

Answer

a) \(9\frac{6}{11}\) b) The division has quotient \(9\) and remainder \(6\), so \(x=105\) and \(105\div11=9\) remainder \(6\).
5408565
Group A shares \(3\) pizzas equally among \(4\) students. Group B shares \(6\) same-size pizzas equally among \(8\) students. Does each student receive the same amount in both groups? Write each share as a fraction and explain.

Hints

- Write each equal share as total pizzas divided by number of students. - Express each quotient as a fraction and simplify. - Think about what happens to a share when both the total and the number of recipients are doubled.

Solution

1. In Group A, each student receives \(3\div4=\frac{3}{4}\) pizza. 2. In Group B, each student receives \(6\div8=\frac{6}{8}\) pizza. 3. Simplify \(\frac{6}{8}=\frac{3}{4}\). 4. Doubling both the number of pizzas and the number of students keeps the amount per student unchanged.

Answer

Yes. Each student receives \(\frac{3}{4}\) pizza because \(3\div4=\frac{3}{4}\) and \(6\div8=\frac{6}{8}=\frac{3}{4}\).
5409155
A bus travels \(43\) miles during \(5\) equal time intervals. What exact distance does it travel per interval? Write the result as a division expression, a fraction, and a mixed number. Explain why the remainder becomes the numerator of the fractional part.

Hints

- Divide to find the whole miles in each interval and the remainder. - Think about how the leftover miles are shared among all \(5\) intervals. - Use that equal sharing to write the fractional part of the mixed number.

Solution

1. Equal intervals give \(43\div5\), which is \(\frac{43}{5}\). 2. Since \(43=8\times5+3\), each interval gets \(8\) whole miles, with \(3\) miles still to share equally among the \(5\) intervals. 3. Each interval receives \(\frac{3}{5}\) of one more mile, so \(\frac{43}{5}=8\frac{3}{5}\).

Answer

\(43\div5=\frac{43}{5}=8\frac{3}{5}\) miles per interval. The remainder \(3\) becomes the numerator because the \(3\) leftover miles are divided equally among \(5\) intervals.
5409395
A robotics club logs \(17\) hours of testing across \(3\) equal sessions. A second club logs \(22\) hours across \(4\) equal sessions. a) Write each average as an exact fraction of an hour per session. Keep both exact quotients in fraction form. b) Which club has the greater average, and by how much? c) Explain how the numerator and denominator of each fraction record the corresponding division situation.

Hints

- Translate each equal-share situation directly into total hours divided by number of sessions. - Compare the two exact fractional quotients without changing them to decimals or mixed numbers. - Relate the top and bottom numbers of each fraction back to the quantities in the sharing situation.

Solution

1. The first average is \(17\div3=\frac{17}{3}\) hour per session, and the second is \(22\div4=\frac{22}{4}=\frac{11}{2}\) hour per session. 2. Using sixths, \(\frac{17}{3}=\frac{34}{6}\) and \(\frac{11}{2}=\frac{33}{6}\), so the first club's average is greater by \(\frac{1}{6}\) hour per session. 3. In each fraction, the numerator is the total number of hours being divided and the denominator is the number of equal sessions.

Answer

a) First club: \(\frac{17}{3}\) hour per session. Second club: \(\frac{11}{2}\) hours per session. b) The first club has the greater average by \(\frac{1}{6}\) hour per session. c) The numerator records total hours; the denominator records the number of equal sessions.
5410745
Explain how \(\frac{29}{4}\) can be read as a division expression and as a mixed number. Then write a short equal-sharing situation that could have this exact value as one share.

Hints

- Read the fraction bar as division from numerator to denominator. - Use whole-number division to identify the mixed-number part and remainder. - In the context, make the numerator a total amount and the denominator the number of equal shares.

Solution

1. The fraction \(\frac{29}{4}\) represents \(29\div4\). 2. Since \(29=7\times4+1\), \(\frac{29}{4}=7\frac{1}{4}\). 3. One valid situation is sharing \(29\) yards of material equally among \(4\) displays; each display receives \(7\frac{1}{4}\) yards.

Answer

\(\frac{29}{4}=29\div4=7\frac{1}{4}\). One valid context is sharing \(29\) yards equally among \(4\) displays. A valid story must use \(29\) as a total, \(4\) as the number of equal shares, and \(7\frac{1}{4}\) as the amount in each share.
5411155
Write \(34\div9\) as an exact fraction. Keep the quotient in fraction form as you determine how much must be added to reach \(4\). Explain why the missing amount has denominator \(9\).

Hints

- Express the whole number \(4\) using the same denominator as the quotient fraction. - Compare how many ninths the quotient has with how many ninths make \(4\) wholes. - Connect the denominator back to the divisor in the original division expression.

Solution

1. The exact quotient is \(\frac{34}{9}\). 2. Since \(4=\frac{36}{9}\), the amount needed is \(\frac{36}{9}-\frac{34}{9}=\frac{2}{9}\). 3. The denominator remains \(9\) because the quotient is measured in ninths: reaching \(4\) requires \(36\) ninths, and the quotient already contains \(34\) ninths.

Answer

\(34\div9=\frac{34}{9}\), and \(\frac{2}{9}\) must be added to reach \(4\). The missing amount is in ninths because the divisor \(9\) sets the size of the fractional parts.
5411235
Interpret \(\frac{47}{8}\) as a whole-number division expression. Keep the exact value in fraction and division form. Use the nearby product \(6\times8=48\) to determine how far the quotient is below \(6\), and explain why that distance follows from the division interpretation.

Hints

- Compare the dividend with the nearby multiple of \(8\) that would give exactly \(6\) groups. - Think about what a difference of \(1\) in the dividend becomes after division by \(8\). - Keep the reasoning in division and fraction form.

Solution

1. The fraction \(\frac{47}{8}\) represents \(47\div8\). 2. Six whole groups of \(8\) would require \(48\), which is \(1\) more than the dividend \(47\). 3. One unit short in the dividend corresponds to \(\frac{1}{8}\) of one group after division by \(8\). Therefore \(\frac{47}{8}\) is \(\frac{1}{8}\) below \(6\).

Answer

\(\frac{47}{8}=47\div8\), and the exact quotient is \(\frac{1}{8}\) below \(6\). The dividend is one unit short of \(48=6\times8\), so dividing that one-unit shortfall by \(8\) gives \(\frac{1}{8}\).
5102525
Find the missing positive whole numbers so that the equations are true. Each fraction on the right is in simplest form. a) \(x\div12=\frac{3}{4}\) b) \(56\div y=\frac{7}{8}\) c) \(144\div60=\frac{z}{5}\)

Hints

- Write each quotient as a fraction. - Decide whether to scale up or simplify the fraction. - Check by substituting each missing number into the original equation.

Solution

1. For a), \(\frac{x}{12}=\frac{3}{4}\). Multiply the numerator and denominator of \(\frac{3}{4}\) by \(3\) to get \(\frac{9}{12}\), so \(x=9\). 2. For b), \(\frac{56}{y}=\frac{7}{8}\). Since \(56=7\times8\), the denominator must be \(8\times8=64\), so \(y=64\). 3. For c), \(\frac{144}{60}=\frac{z}{5}\). Divide the numerator and denominator by \(12\): \(\frac{144}{60}=\frac{12}{5}\), so \(z=12\).

Answer

a) \(x=9\) b) \(y=64\) c) \(z=12\)
5102735
Use the meaning of a fraction as division to find the positive whole numbers \(x\) and \(y\). Explain what the whole-number quotient and fractional remainder mean in each division. a) \(\frac{x}{8}=15\frac{3}{4}\) b) \(\frac{210}{y}=4\frac{2}{3}\)

Hints

- Interpret each fraction bar as a division sign. - For a), translate the fractional part of the mixed quotient into a remainder relative to the divisor. - For b), the remainder is two thirds of the unknown divisor; use that relationship with the four whole divisor groups.

Solution

1. For a), \(x\div8=15\frac{3}{4}\). Three fourths of a divisor of \(8\) is \(6\), so the division has quotient \(15\) and remainder \(6\). Thus \(x=15\times8+6=126\). 2. For b), \(210\div y=4\frac{2}{3}\). Imagine dividing one copy of the unknown divisor into \(3\) equal thirds. Four whole divisor groups contain \(12\) thirds, and the extra \(\frac{2}{3}\) makes \(14\) equal thirds altogether. 3. Since those \(14\) thirds total \(210\), one third is \(210\div14=15\). The whole divisor is \(3\times15=45\), so \(y=45\). 4. Check: \(210\div45=4\) remainder \(30\), and \(\frac{30}{45}=\frac{2}{3}\).

Answer

a) \(x=126\): \(126\div8=15\) remainder \(6\), and \(\frac{6}{8}=\frac{3}{4}\). b) \(y=45\): \(210\div45=4\) remainder \(30\), and \(\frac{30}{45}=\frac{2}{3}\).

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