Add unlike fractions

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What is a fraction?

Back

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

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What does it mean to add unlike fractions?

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Adding unlike fractions means combining fractions that have different denominators. To do this, you must first find a common denominator.

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CCSS.7.NS.A.1C

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How do you find a common denominator for two fractions?

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To find a common denominator, identify the least common multiple (LCM) of the denominators of the fractions.

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Back

The first step is to find the least common denominator (LCD) of 5 and 4, which is 20.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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Back

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CCSS.3.NF.A.3B

CCSS.4.NF.A.1

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Back

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CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

Back

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CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

Back

Front

Back

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Back

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2