Question

estimated to the nearest hundreds
24 estimated to the nearest tens = 20.
Therefore, the required estimation is 600 = 20 = 30.
EXERCISE 1.3
Round off the following to the nearest tens.
(a) 82
(b) 95
(c) 843
Round off the following to the nearest hundreds.
(a) 78
(b) 336
(c) 9876
Round off the following to the nearest thousands.
(a) 710
(b) 8702
(c) 4368
Estimate each sum as directed.
(a) 87 + 14 (to the nearest 10s)
(b) 574 + 465 (to the nearest 100s)​

Answer 1

Estimate the following products using general rule:

(a) 578 × 161 (b) 5281 × 3491 (c) 1291 × 592 (d) 9250 × 29

Solution (a)

578 x 161

Rounding off 578 to the nearest hundreds, we get 600

And, rounding off 161 to the nearest hundreds, we get 200

Therefore, 600 x 200 = 1,20,000

It means that estimate of 578 x 161 is equal to 1,20,000 according to the general rule.

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