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Grade 5fractionsOriginal practice

Adding & Subtracting Fractions with Unlike Denominators

5th grade fraction arithmetic practice. Find common denominators, convert equivalent fractions, and simplify sums to simplest form.

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Grade 5 · math

Adding & Subtracting Fractions with Unlike Denominators

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Grade 5 · math · continued

Adding & Subtracting Fractions with Unlike Denominators

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Add or subtract. Choose the simplified result.

1.What is the sum of 1/3 + 1/4 ?

A2/7

B7/12

C5/12

D2/12

Working

2.What is the result of 3/5 - 1/2 ?

A1/10

B2/3

C2/10

D4/7

Working

3.Solve: 2/3 + 5/6. Simplify your answer as a mixed number.

A7/9

B1 1/2 (or 9/6)

C1 1/6

D7/6

Working

Grade 5 · math · Answer key

Adding & Subtracting Fractions with Unlike Denominators

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Grade 5 · math · Answer key · continued

Adding & Subtracting Fractions with Unlike Denominators

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Add or subtract. Choose the simplified result.

1.What is the sum of 1/3 + 1/4 ?

B. 7/12

Find common denominator 12: 1/3 = 4/12, and 1/4 = 3/12. Then add numerators: 4/12 + 3/12 = 7/12.

2.What is the result of 3/5 - 1/2 ?

A. 1/10

Find common denominator 10: 3/5 = 6/10, and 1/2 = 5/10. Subtract numerators: 6/10 - 5/10 = 1/10.

3.Solve: 2/3 + 5/6. Simplify your answer as a mixed number.

B. 1 1/2 (or 9/6)

Common denominator is 6: 2/3 = 4/6. Then 4/6 + 5/6 = 9/6. Simplify: 9/6 = 3/2 = 1 1/2.