Using Benchmark Fractions to Estimate Sums & Differences

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What is a benchmark fraction?

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A benchmark fraction is a simple fraction that is easy to work with, such as 0, 1/2, or 1. It helps in estimating sums and differences of other fractions.

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CCSS.3.NF.A.3C

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How do you estimate the sum of fractions using benchmark fractions?

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To estimate the sum of fractions, round each fraction to the nearest benchmark fraction and then add those rounded values.

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CCSS.4.NF.A.2

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How do you estimate the difference of fractions using benchmark fractions?

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To estimate the difference of fractions, round each fraction to the nearest benchmark fraction and then subtract the rounded values.

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CCSS.4.NF.A.2

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What is the purpose of using benchmark fractions?

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Benchmark fractions simplify calculations and help in making quick estimates of sums and differences.

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CCSS.4.NF.B.3A

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It is closer to 2.

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

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It is closer to 1.

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

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