Estimate the following products (by general rule):
a) 271 x 362
(b) 5271 x 3411
(c) 32 x 488
(d) 451 x 200

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98102 17979381 15616 90200
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Answer:

(a) 578 × 161

Rounding off by general rule, 598 and 161 may be rounded off to 600 and 200 respectively.

(b) 5281 × 3491

Rounding off by general rule, 5281 and 3491 may be rounded off to 5000 and 3000 respectively.

(c) 1291 × 592
Rounding off by general rule, 1291 and 592 may be rounded off to 1000 and 600 respectively.

(d) 9250 × 29
Rounding off by general rule, 9250 and 29 may be rounded off to 9000 and 30 respectively.

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