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 used as a reference point to estimate the value of other fractions. Common benchmark fractions include 0, 1/2, and 1.

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How do you estimate the sum of two fractions?

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

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The sum is estimated to be greater than 1.

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How can you determine if a fraction is greater than or less than 1?

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If the numerator is greater than the denominator, the fraction is greater than 1. If the numerator is less than the denominator, the fraction is less than 1.

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How do you estimate the difference between two fractions?

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

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Mia uses about 1 bag of gravel in one day.

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What is the purpose of using benchmark fractions in estimation?

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Benchmark fractions simplify the process of estimating sums and differences of fractions by providing easy reference points.