Question

9. Round off the following numbers to the nearest thousand :

a) 7654 ; b) 98177 ; c) 120841

10. Estimate the difference between 74582 and 65382 by rounding them off to the

nearest thousand, and compare it with the actual difference.

11. Estimate 56 X 77 by rounding off the first number up and the second number

down.

12. Estimate the quotient in the following :

a) 58 ÷ 26 ; b) 4800 ÷ 97

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Answer 1

$\bf{\red{Answer}}$

9.

a) 7654 - 8000

b) 98177 - 99000

c) 120841 - 121000

10.

Actual diffⁿ 74582 - 65382 = 9200

Diffⁿ after rounding off 75000 - 65000 = 10000

Comparison ➱ 10000 - 9200 = 800

11.

60 × 80 = 4800

12.

60 ÷ 30 = 2

4800 ÷ 100 = 48

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Answer 2

9. = a) 8000 ; b) 98000 ; b) 121000

10.= estimation of 74582= 75000

estimation of 65382=65000

75000-65000

=10000

difference=10000

actual difference=9200

ans= therefore,10000 is greater than 9200.

11.= estimation of 56 = 60

estimation of 77 = 80

=60×80= 4800

12.= a) 60÷26=2

b) 4800÷100=48