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

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

Estimate the difference: 10/12 - 5/12

Back

1/2

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Estimate the difference: 4/8 - 2/8

Back

1/2

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.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

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

Estimate the sum: 7/8 + 3/8

Back

1 1/2

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is the nearest benchmark fraction to 3/10?

Back

1/2

Tags

CCSS.4.NF.A.2

Front

What is the nearest benchmark fraction to 1/4?

Back

0

Tags

CCSS.4.NF.A.2