# Estimate Differences

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Consider the following options:

68 – 32

49 – 25

Let's identify the expression that has a difference nearly about 40.

Find the difference of each expression by rounding the numbers.

Let’s look at first option.

Round the numbers and then subtract.

 68 – 32 = ? ↓ ↓ 70 – 30 = 40

The given expression has a difference of about 40.

Now, look at second option.

 49 – 25 = ? ↓ ↓ 50 – 30 = 20

The given expression has a difference of about 20.

So, 68 – 32 has a difference nearly to 40.﻿

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