Question

Find the actual sun first and them estimated by rounding off to the nearest 10 compare both sums.

(a) 7 2
+ 1 1
_________

(b) 5 9
+ 3 5
_______​

Answer 1

Step-by-step explanation:

a) 72 + 11 = 83

b) 59 + 35 = 94

Round off to nearest 10

a) 80

b) 90

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Answer 2

a) Normal- 83 estimated- 80

b) Normal- 94 estimated- 100

This is how it is done

You can round each addend to the nearest hundred to estimate the sum. Estimate the sum 1,472 + 398 + 772 + 164 by rounding each number to the nearest hundred. First, round each number to the nearest hundred. Then, add the rounded numbers together.

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