Estimating fractions using benchmarks

Front

What is a benchmark fraction?

Back

A benchmark fraction is a simple fraction that is easy to understand and use for estimation, such as 0, 1/2, or 1.

Front

How do you estimate the difference of two fractions?

Back

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

Front

Estimate the difference: 9/10 - 8/10

Back

0

Front

Estimate the difference: 10/12 - 5/12

Back

1/2

Front

Estimate the difference: 4/8 - 2/8

Back

1/2

Front

How do you estimate the sum of two fractions?

Back

To estimate the sum, round each fraction to the nearest benchmark fraction and then add.

Front

Estimate the sum: 9/10 + 2/10

Back

1

Front

Estimate the sum: 7/8 + 3/8

Back

1 1/2

Front

What is the nearest benchmark fraction to 3/10?

Back

1/2

Front

What is the nearest benchmark fraction to 1/4?

Back

0