FIND THE COMMON DENOMINATOR

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What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions, allowing them to be added or compared.

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How do you find the least common denominator (LCD) of two fractions?

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To find the LCD, list the multiples of each denominator and identify the smallest multiple that appears in both lists.

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20

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CCSS.5.NF.A.1

CCSS.5.NF.A.2

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40

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36

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Front

Why is it important to find a common denominator when adding fractions?

Back

Finding a common denominator allows fractions to be combined into a single fraction, making calculations easier.

Front

What is the least common multiple (LCM)?

Back

The least common multiple is the smallest multiple that two or more numbers share.

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How can you use prime factorization to find the LCM?

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By breaking down each number into its prime factors and taking the highest power of each prime factor.