Question

estimate 636 + 988 by rounding off the nearest tens

Answer 1

Hope this will help you all

Answer 2

Concept:

The Estimation can be done by rounding off the number to its nearest tens. As 9 can be estimated to be 10 and 21 can be estimated to be 20.

Given:

The two numbers are 636 and 988.

Find:

Estimate the value of 636 + 988.

Solution:

Estimating the value of 636 + 988

As the number 636 is nearer to 640 than 630.

Rounding up the number 636 to 640.

Similarly,

As the number 988 is nearer to 990 than 980.

Rounding up the number 988 to 990.

Now, adding the rounded numbers, 990 and 640.

640+990=1630

636 +988 ≈ 1630

Hence, the estimated value of the 636 + 988 is 1630.

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