Common Core: 5th Grade Math : Interpret Multiplication as Scaling: CCSS.Math.Content.5.NF.B.5

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

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Example Questions

Example Question #11 : Interpret Multiplication As Scaling: Ccss.Math.Content.5.Nf.B.5

Fill in the blank with the correct sign. 

\(\displaystyle \small 12\times\frac{3}{4}\) ____________\(\displaystyle \small 12\)

Possible Answers:

\(\displaystyle \small =\)

\(\displaystyle < \)

\(\displaystyle \small >\)

Correct answer:

\(\displaystyle < \)

Explanation:

\(\displaystyle \small 12\times\frac{3}{4}\) ____________\(\displaystyle \small 12\)

When we multiply a fraction by a whole number, we first want to make the whole number into a fraction. We do that by putting the whole number over \(\displaystyle \small 1.\) Then we multiply like normal. 

\(\displaystyle \small \frac{12}{1}\times\frac{3}{4}=\frac{36}{4}\)

\(\displaystyle \small \frac{36}{4}=9\) Because \(\displaystyle 4\) can go into \(\displaystyle 9\) an even \(\displaystyle 9\) times

\(\displaystyle \small 9< 12\)

Example Question #12 : Interpret Multiplication As Scaling: Ccss.Math.Content.5.Nf.B.5

Fill in the blank with the correct sign. 

\(\displaystyle \small 3\) __________ \(\displaystyle \small \small 3\times\frac{3}{5}\)

Possible Answers:

\(\displaystyle \small < \)

\(\displaystyle \small =\)

\(\displaystyle \small >\)

Correct answer:

\(\displaystyle \small >\)

Explanation:

\(\displaystyle \small 3\) __________ \(\displaystyle \small \small 3\times\frac{3}{5}\)

When we multiply a fraction by a whole number, we first want to make the whole number into a fraction. We do that by putting the whole number over \(\displaystyle 1.\) Then we multiply like normal. 

\(\displaystyle \small \frac{3}{1}\times\frac{3}{5}=\frac{9}{5}\)

\(\displaystyle \small \frac{9}{5}=1\frac{4}{5}\) Because \(\displaystyle 5\) can go into \(\displaystyle \small 9\) only \(\displaystyle 1\) time, and \(\displaystyle \small \small \frac{4}{5}\) is left over. 

\(\displaystyle \small 3\)__________ \(\displaystyle \small 1\frac{4}{9}\)

\(\displaystyle \small 3>1\frac{4}{9}\)

Example Question #12 : Interpret Multiplication As Scaling: Ccss.Math.Content.5.Nf.B.5

Fill in the blank with the correct sign. 

\(\displaystyle \small 4\) __________ \(\displaystyle \small \small 4\times\frac{1}{4}\)

Possible Answers:

\(\displaystyle \small =\)

\(\displaystyle \small < \)

\(\displaystyle \small >\)

Correct answer:

\(\displaystyle \small >\)

Explanation:

\(\displaystyle \small 4\) __________ \(\displaystyle \small \small 4\times\frac{1}{4}\)

When we multiply a fraction by a whole number, we first want to make the whole number into a fraction. We do that by putting the whole number over \(\displaystyle 1.\) Then we multiply like normal. 

\(\displaystyle \small \frac{4}{1}\times\frac{1}{4}=\frac{4}{4}\)

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

\(\displaystyle \small 4\) __________ \(\displaystyle \small 1\)

\(\displaystyle \small 4>1\)

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