Common Core: 4th Grade Math : Build fractions from unit fractions

Study concepts, example questions & explanations for Common Core: 4th Grade Math

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Example Questions

Example Question #1 : Decompose A Fraction Into A Sum Of Fractions: Ccss.Math.Content.4.Nf.B.3b

\(\displaystyle \frac{3}{8}\) is equal to which of the options below? 

Possible Answers:

\(\displaystyle \frac{1}{2}+\frac{1}{2}+\frac{1}{2}\)

\(\displaystyle \frac{3}{8}+\frac{1}{8}\)

\(\displaystyle \frac{1}{8}+\frac{1}{8}+\frac{1}{8}\)

\(\displaystyle \frac{2}{8}+\frac{2}{}8\)

\(\displaystyle \frac{4}{8}+\frac{1}{8}\)

Correct answer:

\(\displaystyle \frac{1}{8}+\frac{1}{8}+\frac{1}{8}\)

Explanation:

When we add fractions, we have to have common denominators and we only add the numerators. 

\(\displaystyle \frac{1}{8}+\frac{1}{8}+\frac{1}{8}=\frac{3}{8}\)

Example Question #2 : Decompose A Fraction Into A Sum Of Fractions: Ccss.Math.Content.4.Nf.B.3b

\(\displaystyle \frac{2}{4}\) is equal to which of the options below? 

 

Possible Answers:

\(\displaystyle \frac{1}{2}+\frac{1}{2}+\frac{1}{2}\)

\(\displaystyle \frac{1}{2}+\frac{1}{2}\)

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

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

\(\displaystyle \frac{3}{4}+\frac{1}{4}\)

Correct answer:

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

Explanation:

When we add fractions, we have to have common denominators and we only add the numerators. 

\(\displaystyle \frac{1}{4}+\frac{1}{4}=\frac{2}{4}\)

Example Question #3 : Decompose A Fraction Into A Sum Of Fractions: Ccss.Math.Content.4.Nf.B.3b

\(\displaystyle \frac{3}{4}\) is equal to which of the options below? 

 

Possible Answers:

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

\(\displaystyle \frac{1}{2}+\frac{2}{1}\)

\(\displaystyle \frac{3}{4}+\frac{2}{4}\)

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

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

Correct answer:

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

Explanation:

When we add fractions, we have to have common denominators and we only add the numerators. 

\(\displaystyle \frac{1}{4}+\frac{1}{4}+\frac{1}{4}=\frac{3}{4}\)

Example Question #4 : Decompose A Fraction Into A Sum Of Fractions: Ccss.Math.Content.4.Nf.B.3b

\(\displaystyle \frac{2}{6}\) is equal to which of the options below? 

 

Possible Answers:

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

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

\(\displaystyle \frac{1}{6}+\frac{1}{6}+\frac{1}{3}\)

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

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

Correct answer:

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

Explanation:

When we add fractions, we have to have common denominators and we only add the numerators. 

\(\displaystyle \frac{1}{6}+\frac{1}{6}=\frac{2}{6}\)

Example Question #5 : Decompose A Fraction Into A Sum Of Fractions: Ccss.Math.Content.4.Nf.B.3b

\(\displaystyle \frac{3}{5}\) is equal to which of the options below? 

 

Possible Answers:

\(\displaystyle \frac{1}{2}+\frac{2}{3}\)

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

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

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

\(\displaystyle \frac{1}{2}+\frac{2}{3}+\frac{1}{5}\)

Correct answer:

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

Explanation:

When we add fractions, we have to have common denominators and we only add the numerators. 

\(\displaystyle \frac{1}{5}+\frac{1}{5}+\frac{1}{5}=\frac{3}{5}\)

Example Question #6 : Decompose A Fraction Into A Sum Of Fractions: Ccss.Math.Content.4.Nf.B.3b

\(\displaystyle \frac{2}{7}\) is equal to which of the options below? 

Possible Answers:

\(\displaystyle \frac{1}{3}+\frac{1}{4}\)

\(\displaystyle \frac{1}{7}+\frac{1}{7}+\frac{1}{7}\)

\(\displaystyle \frac{1}{3}+\frac{1}{4}+\frac{1}{3}+\frac{1}{4}\)

\(\displaystyle \frac{1}{7}+\frac{1}{7}+\frac{1}{7}+\frac{1}{7}\)

\(\displaystyle \frac{1}{7}+\frac{1}{7}\)

Correct answer:

\(\displaystyle \frac{1}{7}+\frac{1}{7}\)

Explanation:

When we add fractions, we have to have common denominators and we only add the numerators. 

\(\displaystyle \frac{1}{7}+\frac{1}{7}=\frac{2}{7}\)

Example Question #7 : Decompose A Fraction Into A Sum Of Fractions: Ccss.Math.Content.4.Nf.B.3b

\(\displaystyle \frac{2}{3}\) is equal to which of the options below? 

 

Possible Answers:

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

\(\displaystyle \frac{1}{2}+\frac{1}{1}+\frac{1}{3}\)

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

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

\(\displaystyle \frac{1}{2}+\frac{1}{1}\)

Correct answer:

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

Explanation:

When we add fractions, we have to have common denominators and we only add the numerators. 

\(\displaystyle \frac{1}{3}+\frac{1}{3}=\frac{2}{3}\)

Example Question #1 : Build Fractions From Unit Fractions

\(\displaystyle \frac{2}{8}\) is equal to which of the options below? 

 

Possible Answers:

\(\displaystyle \frac{3}{2}+\frac{1}{4}\)

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

\(\displaystyle \frac{1}{8}+\frac{1}{8}\)

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

\(\displaystyle \frac{1}{2}+\frac{1}{2}\)

Correct answer:

\(\displaystyle \frac{1}{8}+\frac{1}{8}\)

Explanation:

When we add fractions, we have to have common denominators and we only add the numerators. 

\(\displaystyle \frac{1}{8}+\frac{1}{8}=\frac{2}{8}\)

Example Question #1 : Build Fractions From Unit Fractions

\(\displaystyle \frac{3}{9}\) is equal to which of the options below? 

 

Possible Answers:

\(\displaystyle \frac{1}{9}+\frac{1}{9}+\frac{1}{9}\)

\(\displaystyle \frac{1}{9}+\frac{1}{9}+\frac{1}{9}+\frac{1}{9}\)

\(\displaystyle \frac{1}{5}+\frac{2}{5}\)

\(\displaystyle \frac{1}{4}+\frac{2}{5}\)

\(\displaystyle \frac{1}{9}+\frac{1}{9}\)

Correct answer:

\(\displaystyle \frac{1}{9}+\frac{1}{9}+\frac{1}{9}\)

Explanation:

When we add fractions, we have to have common denominators and we only add the numerators. 

\(\displaystyle \frac{1}{9}+\frac{1}{9}+\frac{1}{9}=\frac{3}{9}\)

Example Question #1 : Build Fractions From Unit Fractions

\(\displaystyle \frac{2}{10}\) is equal to which of the options below? 

 

Possible Answers:

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

\(\displaystyle \frac{2}{5}+\frac{1}{10}\)

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

\(\displaystyle \frac{1}{10}+\frac{1}{10}\)

\(\displaystyle \frac{1}{10}+\frac{1}{10}+\frac{1}{10}\)

Correct answer:

\(\displaystyle \frac{1}{10}+\frac{1}{10}\)

Explanation:

When we add fractions, we have to have common denominators and we only add the numerators. 

\(\displaystyle \frac{1}{10}+\frac{1}{10}=\frac{2}{10}\)

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