Estimate the following products using general rule:(a)   578 × 161   (b)    5281 × 3491      (c) 1291 × 592   (d) 9250 × 29Make four more such examples

Explanation

(a) We have to estimate `578xx161`

Here we can roundoff `578 " to " 600 " and " 161 " to " 200`

`:. " estimated product " 600xx200 = 120000`

(b) We have to estimate `5281xx3491`

Here we can roundoff `5281 " to " 5000 " and " 3491 " to " 3000`

So the estimated product `=5000xx3000= 15000000`

(c) We have to estimated `1291xx592`

Here we can roundoff `1291 " to " 1000 " and "
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