Estimating Sums and Differences of Fractions

Front

What is estimating sums of fractions?

Back

Estimating sums of fractions involves rounding the fractions to the nearest whole number or simple fraction to make addition easier.

Front

Estimate 2/9 + 7/8.

Back

1

Front

Estimate 4/5 + 5/9.

Back

1 1/2

Front

Which sum is greatest? Estimate: 2/7 + 3/8, 1/10 + 3/8, 1/6 + 1/8, 2/9 + 1/8.

Back

2/7 + 3/8

Front

What does it mean to estimate the difference of fractions?

Back

Estimating the difference of fractions means rounding the fractions to make subtraction simpler.

Front

Estimate 11/12 − 7/10.

Back

less than 1/2

Front

Michaela has 11/12 yard of orange fabric and 7/8 yard of green fabric. She uses 1/2 yard of each color. Estimate how much fabric she has left.

Back

1 yard

Front

What is the first step in estimating sums of fractions?

Back

The first step is to round each fraction to the nearest simple fraction or whole number.

Front

Why is estimating useful when adding fractions?

Back

Estimating helps to quickly determine an approximate answer without needing exact calculations.

Front

What is a common method for estimating fractions?

Back

A common method is to convert fractions to decimals or round them to the nearest half or whole.