Subtract Fractions with Unlike Denominators

Front

What do you need to find when adding or subtracting fractions with unlike denominators?

Back

You need to find the least common multiple (LCM) to change your denominator.

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CCSS.7.NS.A.1C

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When do you simplify fractions?

Back

You simplify all the time unless the fraction is already simplified.

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Back

Find the least common multiple of the denominators (3 and 8), which is 24.

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CCSS.5.NF.A.1

CCSS.5.NF.A.2

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Back

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CCSS.4.NF.A.1

CCSS.3.NF.A.3B

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Back

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CCSS.4.NF.A.1

CCSS.3.NF.A.3B

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Back

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CCSS.4.NF.B.3D

CCSS.4.NF.B.3C

Front

What is the least common multiple of 5 and 2?

Back

The least common multiple (LCM) of 5 and 2 is 10.

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Back

Find the least common multiple of the denominators (5 and 2), which is 10.

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CCSS.5.NF.A.1

CCSS.5.NF.A.2

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Back

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CCSS.4.NF.A.1

CCSS.3.NF.A.3B

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Back

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CCSS.4.NF.A.1

CCSS.3.NF.A.3B