ISEE Lower Level Quantitative : Fractions

Study concepts, example questions & explanations for ISEE Lower Level Quantitative

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Example Questions

Example Question #261 : Fractions

Solve:

\(\displaystyle \small \frac{7}{8}\times\frac{1}{3}\)

Possible Answers:

\(\displaystyle \small \frac{5}{27}\)

\(\displaystyle \small \frac{4}{5}\)

\(\displaystyle \small \frac{9}{11}\)

\(\displaystyle \small \frac{7}{21}\)

\(\displaystyle \small \frac{7}{24}\)

Correct answer:

\(\displaystyle \small \frac{7}{24}\)

Explanation:

When we multiply fractions, we multiply the numerator by the numerator and the denominator by the denominator. 

\(\displaystyle \small \small \frac{7}{8}\times\frac{1}{3}=\frac{7}{24}\)

Example Question #811 : Fractions

Solve:

\(\displaystyle \small \frac{1}{5}\times\frac{1}{8}\)

Possible Answers:

\(\displaystyle \small \frac{1}{20}\)

\(\displaystyle \small \frac{5}{6}\)

\(\displaystyle \small \frac{2}{40}\)

\(\displaystyle \small \frac{1}{12}\)

\(\displaystyle \small \frac{1}{40}\)

Correct answer:

\(\displaystyle \small \frac{1}{40}\)

Explanation:

When we multiply fractions, we multiply the numerator by the numerator and the denominator by the denominator. 

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

Example Question #262 : Fractions

Solve the following:

\(\displaystyle \small \frac{1}{3}\times\frac{1}{9}\)

Possible Answers:

\(\displaystyle \small \frac{5}{27}\)

\(\displaystyle \small \frac{2}{27}\)

\(\displaystyle \small \frac{1}{27}\)

\(\displaystyle \small \frac{1}{6}\)

\(\displaystyle \small \frac{1}{28}\)

Correct answer:

\(\displaystyle \small \frac{1}{27}\)

Explanation:

When we multiply fractions, we multiply the numerator by the numerator and the denominator by the denominator. 

\(\displaystyle \small \small \frac{1}{3}\times\frac{1}{9}=\frac{1}{27}\)

Example Question #263 : Fractions

Solve:

\(\displaystyle \small \frac{2}{5}\times\frac{1}{7}\)

Possible Answers:

\(\displaystyle \small \frac{7}{8}\)

\(\displaystyle \small \frac{2}{35}\)

\(\displaystyle \small \frac{1}{15}\)

\(\displaystyle \small \frac{2}{7}\)

\(\displaystyle \small \frac{1}{5}\)

Correct answer:

\(\displaystyle \small \frac{2}{35}\)

Explanation:

When we multiply fractions, we multiply the numerator by the numerator and the denominator by the denominator. 

\(\displaystyle \small \small \frac{2}{5}\times\frac{1}{7}=\frac{2}{35}\)

Example Question #264 : Fractions

Jessica made \(\displaystyle 2\) gallons of punch. \(\displaystyle \frac{1}{5}\) of the punch was water. How many gallons of water did she use to make the punch? 

Possible Answers:

\(\displaystyle \frac{4}{5}\)

\(\displaystyle \frac{3}{5}\)

\(\displaystyle \frac{2}{5}\)

\(\displaystyle 1\)

\(\displaystyle 2\)

Correct answer:

\(\displaystyle \frac{2}{5}\)

Explanation:

A keyword in our question that gives us a clue that we are going to multiply to solve this problem is the word "of". \(\displaystyle \frac{1}{5}\) of the punch is water. 

We know that we have \(\displaystyle 2\) gallons of punch so we can set up our multiplication problem.

\(\displaystyle \frac{1}{5}\times2\) 

2 5 

 \(\displaystyle \frac{1}{5}\times2\) which means \(\displaystyle \frac{1}{5}\) of each group of \(\displaystyle 2=\frac{2}{5}\)

Example Question #2 : Interpret The Product (A/B) × Q As A Part Of A Partition Of Q Into B Equal Parts: Ccss.Math.Content.5.Nf.B.4a

Ronda made \(\displaystyle 3\) gallons of punch. \(\displaystyle \frac{1}{5}\) of the punch was water. How much water did she use to make the punch? 

 

Possible Answers:

\(\displaystyle 1\)

\(\displaystyle 3\)

\(\displaystyle \frac{1}{5}\)

\(\displaystyle \frac{2}{5}\)

\(\displaystyle \frac{3}{5}\)

Correct answer:

\(\displaystyle \frac{3}{5}\)

Explanation:

A keyword in our question that gives us a clue that we are going to multiply to solve this problem is the word "of". \(\displaystyle \frac{1}{5}\) of the punch is water. 

We know that we have \(\displaystyle 3\) gallons of punch so we can set up our multiplication problem.

\(\displaystyle \frac{1}{5}\times3\) 

3 5 

 \(\displaystyle \frac{1}{5}\times3\) which means \(\displaystyle \frac{1}{5}\) of each group of \(\displaystyle 3=\frac{3}{5}\)

Example Question #3 : Interpret The Product (A/B) × Q As A Part Of A Partition Of Q Into B Equal Parts: Ccss.Math.Content.5.Nf.B.4a

Mary-Beth made \(\displaystyle 4\) gallons of punch. \(\displaystyle \frac{1}{5}\) of the punch was water. How much water did she use to make the punch? 

 

Possible Answers:

\(\displaystyle \frac{3}{5}\)

\(\displaystyle \frac{4}{5}\)

\(\displaystyle 2\)

\(\displaystyle \frac{2}{5}\)

\(\displaystyle 4\)

Correct answer:

\(\displaystyle \frac{4}{5}\)

Explanation:

A keyword in our question that gives us a clue that we are going to multiply to solve this problem is the word "of". \(\displaystyle \frac{1}{5}\) of the punch is water. 

We know that we have \(\displaystyle 4\) gallons of punch so we can set up our multiplication problem.

\(\displaystyle \frac{1}{5}\times4\) 

 4 5

 \(\displaystyle \frac{1}{5}\times4\) which means \(\displaystyle \frac{1}{5}\) of each group of \(\displaystyle 4=\frac{4}{5}\)

Example Question #1 : Interpret The Product (A/B) × Q As A Part Of A Partition Of Q Into B Equal Parts: Ccss.Math.Content.5.Nf.B.4a

Alison made \(\displaystyle 2\) gallons of punch. \(\displaystyle \frac{1}{3}\) of the punch was water. How much water did she use to make the punch? 

Possible Answers:

\(\displaystyle \frac{3}{3}\)

\(\displaystyle 2\)

\(\displaystyle \frac{2}{3}\)

\(\displaystyle \frac{1}{3}\)

\(\displaystyle 3\)

Correct answer:

\(\displaystyle \frac{2}{3}\)

Explanation:

A keyword in our question that gives us a clue that we are going to multiply to solve this problem is the word "of". \(\displaystyle \frac{1}{3}\) of the punch is water. 

We know that we have \(\displaystyle 2\) gallons of punch so we can set up our multiplication problem.

\(\displaystyle \frac{1}{3}\times2\) 

2 3 

 \(\displaystyle \frac{1}{3}\times2\) which means \(\displaystyle \frac{1}{3}\) of each group of \(\displaystyle 2=\frac{2}{3}\)

Example Question #5 : Interpret The Product (A/B) × Q As A Part Of A Partition Of Q Into B Equal Parts: Ccss.Math.Content.5.Nf.B.4a

Jessica made \(\displaystyle 2\) gallons of punch. \(\displaystyle \frac{1}{4}\) of the punch was water. How much water did she use to make the punch? 

Possible Answers:

\(\displaystyle 4\)

\(\displaystyle \frac{4}{4}\)

\(\displaystyle \frac{2}{4}\)

\(\displaystyle \frac{1}{4}\)

\(\displaystyle 2\)

Correct answer:

\(\displaystyle \frac{2}{4}\)

Explanation:

A keyword in our question that gives us a clue that we are going to multiply to solve this problem is the word "of". \(\displaystyle \frac{1}{4}\) of the punch is water. 

We know that we have \(\displaystyle 2\) gallons of punch so we can set up our multiplication problem.

\(\displaystyle \frac{1}{4}\times2\) 

2 4 

 \(\displaystyle \frac{1}{4}\times2\) which means \(\displaystyle \frac{1}{4}\) of each group of \(\displaystyle 2=\frac{2}{4}\)

Example Question #6 : Interpret The Product (A/B) × Q As A Part Of A Partition Of Q Into B Equal Parts: Ccss.Math.Content.5.Nf.B.4a

Megan made \(\displaystyle 3\) gallons of punch. \(\displaystyle \frac{1}{4}\) of the punch was water. How much water did she use to make the punch? 

 

Possible Answers:

\(\displaystyle \frac{1}{4}\)

\(\displaystyle \frac{3}{4}\)

\(\displaystyle 2\)

\(\displaystyle 3\)

\(\displaystyle \frac{2}{4}\)

Correct answer:

\(\displaystyle \frac{3}{4}\)

Explanation:

A keyword in our question that gives us a clue that we are going to multiply to solve this problem is the word "of". \(\displaystyle \frac{1}{4}\) of the punch is water. 

We know that we have \(\displaystyle 3\) gallons of punch so we can set up our multiplication problem.

\(\displaystyle \frac{1}{4}\times3\) 

3 4 

 \(\displaystyle \frac{1}{4}\times3\) which means \(\displaystyle \frac{1}{4}\) of each group of \(\displaystyle 3=\frac{3}{4}\)

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