Common Core: 5th Grade Math : Solve Division Word Problems with Fractions and Whole Numbers: CCSS.Math.Content.5.NF.B.7c

Study concepts, example questions & explanations for Common Core: 5th Grade Math

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Example Questions

Example Question #171 : Fractions

How many \(\displaystyle \frac{1}{2}\) cup servings are in \(\displaystyle 6\) cups of chocolate chips? 

Possible Answers:

\(\displaystyle 18\)

\(\displaystyle 36\)

\(\displaystyle 12\)

\(\displaystyle 24\)

\(\displaystyle 6\)

Correct answer:

\(\displaystyle 12\)

Explanation:

Because we want to know how many \(\displaystyle \frac{1}{2}\ cup\) servings are in \(\displaystyle 6\) cups, we are dividing \(\displaystyle 6\) by \(\displaystyle \frac{1}{2}\)

Remember, whenever we divide by a fraction, we multiply by the reciprocal

\(\displaystyle \frac{6}{1}\times\frac{2}{1}=\frac{12}{1}=12\)

Example Question #631 : Number & Operations With Fractions

How many \(\displaystyle \frac{1}{5}\ cup\) servings are in \(\displaystyle 6\) cups of sugar? 

 

Possible Answers:

\(\displaystyle 15\)

\(\displaystyle 25\)

\(\displaystyle 10\)

\(\displaystyle 20\)

\(\displaystyle 30\)

Correct answer:

\(\displaystyle 30\)

Explanation:

Because we want to know how many \(\displaystyle \frac{1}{5}\ cup\) servings are in \(\displaystyle 6\) cups, we are dividing \(\displaystyle 6\) by \(\displaystyle \frac{1}{5}\)

Remember, whenever we divide by a fraction, we multiply by the reciprocal

\(\displaystyle \frac{6}{1}\times\frac{5}{1}=\frac{30}{1}=30\)

Example Question #81 : Fractions

How many \(\displaystyle \frac{1}{5}\ cup\) servings are in \(\displaystyle 7\) cups of sugar? 

 

Possible Answers:

\(\displaystyle 49\)

\(\displaystyle 40\)

\(\displaystyle 30\)

\(\displaystyle 42\)

\(\displaystyle 35\)

Correct answer:

\(\displaystyle 35\)

Explanation:

Because we want to know how many \(\displaystyle \frac{1}{5}\ cup\) servings are in \(\displaystyle 7\) cups, we are dividing \(\displaystyle 7\) by \(\displaystyle \frac{1}{5}\)

Remember, whenever we divide by a fraction, we multiply by the reciprocal

\(\displaystyle \frac{7}{1}\times\frac{5}{1}=\frac{35}{1}=35\)

Example Question #82 : Fractions

How many \(\displaystyle \frac{1}{5}\ cup\) servings are in \(\displaystyle 8\) cups of sugar? 

 

Possible Answers:

\(\displaystyle 40\)

\(\displaystyle 20\)

\(\displaystyle 48\)

\(\displaystyle 24\)

\(\displaystyle 16\)

Correct answer:

\(\displaystyle 40\)

Explanation:

Because we want to know how many \(\displaystyle \frac{1}{5}\ cup\) servings are in \(\displaystyle 8\) cups, we are dividing \(\displaystyle 8\) by \(\displaystyle \frac{1}{5}\)

Remember, whenever we divide by a fraction, we multiply by the reciprocal

\(\displaystyle \frac{8}{1}\times\frac{5}{1}=\frac{40}{1}=40\)

Example Question #83 : Fractions

How many \(\displaystyle \frac{1}{5}\ cup\) servings are in \(\displaystyle 9\) cups of sugar? 

 

Possible Answers:

\(\displaystyle 18\)

\(\displaystyle 45\)

\(\displaystyle 27\)

\(\displaystyle 40\)

\(\displaystyle 36\)

Correct answer:

\(\displaystyle 45\)

Explanation:

Because we want to know how many \(\displaystyle \frac{1}{5}\ cup\) servings are in \(\displaystyle 9\) cups, we are dividing \(\displaystyle 9\) by \(\displaystyle \frac{1}{5}\)

Remember, whenever we divide by a fraction, we multiply by the reciprocal

\(\displaystyle \frac{9}{1}\times\frac{5}{1}=\frac{45}{1}=45\)

Example Question #84 : Fractions

How many \(\displaystyle \frac{1}{6}\ cup\) servings are in \(\displaystyle 6\) cups of sugar? 

 

Possible Answers:

\(\displaystyle 24\)

\(\displaystyle 30\)

\(\displaystyle 42\)

\(\displaystyle 48\)

\(\displaystyle 36\)

Correct answer:

\(\displaystyle 36\)

Explanation:

Because we want to know how many \(\displaystyle \frac{1}{6}\ cup\) servings are in \(\displaystyle 6\) cups, we are dividing \(\displaystyle 6\) by \(\displaystyle \frac{1}{6}\)

Remember, whenever we divide by a fraction, we multiply by the reciprocal

\(\displaystyle \frac{6}{1}\times\frac{6}{1}=\frac{36}{1}=36\)

Example Question #85 : Fractions

How many \(\displaystyle \frac{1}{6}\ cup\) servings are in \(\displaystyle 7\) cups of sugar? 

 

Possible Answers:

\(\displaystyle 48\)

\(\displaystyle 30\)

\(\displaystyle 49\)

\(\displaystyle 36\)

\(\displaystyle 42\)

Correct answer:

\(\displaystyle 42\)

Explanation:

Because we want to know how many \(\displaystyle \frac{1}{6}\ cup\) servings are in \(\displaystyle 7\) cups, we are dividing \(\displaystyle 7\) by \(\displaystyle \frac{1}{6}\)

Remember, whenever we divide by a fraction, we multiply by the reciprocal

\(\displaystyle \frac{7}{1}\times\frac{6}{1}=\frac{42}{1}=42\)

Example Question #86 : Fractions

How many \(\displaystyle \frac{1}{6}\ cup\) servings are in \(\displaystyle 8\) cups of sugar? 

 

Possible Answers:

\(\displaystyle 49\)

\(\displaystyle 42\)

\(\displaystyle 48\)

\(\displaystyle 30\)

\(\displaystyle 36\)

Correct answer:

\(\displaystyle 48\)

Explanation:

Because we want to know how many \(\displaystyle \frac{1}{6}\ cup\) servings are in \(\displaystyle 8\) cups, we are dividing \(\displaystyle 8\) by \(\displaystyle \frac{1}{6}\)

Remember, whenever we divide by a fraction, we multiply by the reciprocal

\(\displaystyle \frac{8}{1}\times\frac{6}{1}=\frac{48}{1}=48\)

Example Question #87 : Fractions

How many \(\displaystyle \frac{1}{6}\ cup\) servings are in \(\displaystyle 9\) cups of sugar? 

 

Possible Answers:

\(\displaystyle 42\)

\(\displaystyle 49\)

\(\displaystyle 36\)

\(\displaystyle 54\)

\(\displaystyle 30\)

Correct answer:

\(\displaystyle 54\)

Explanation:

 Because we want to know how many \(\displaystyle \frac{1}{6}\ cup\) servings are in \(\displaystyle 9\) cups, we are dividing \(\displaystyle 9\) by \(\displaystyle \frac{1}{6}\)

Remember, whenever we divide by a fraction, we multiply by the reciprocal

\(\displaystyle \frac{9}{1}\times\frac{6}{1}=\frac{54}{1}=54\)

Example Question #88 : Fractions

How many \(\displaystyle \frac{1}{7}\ cup\) servings are in \(\displaystyle 6\) cups of sugar? 

Because we want to know how many \(\displaystyle \frac{1}{7}\ cup\) servings are in \(\displaystyle 6\) cups, 

Possible Answers:

\(\displaystyle 49\)

\(\displaystyle 24\)

\(\displaystyle 48\)

\(\displaystyle 42\)

\(\displaystyle 35\)

Correct answer:

\(\displaystyle 42\)

Explanation:

we are dividing \(\displaystyle 6\) by \(\displaystyle \frac{1}{7}\)

Remember, whenever we divide by a fraction, we multiply by the reciprocal

\(\displaystyle \frac{6}{1}\times\frac{7}{1}=\frac{42}{1}=42\)

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