• # question_answer 19)                 Estimate the following products using general rule. (a) 578 x 161                       (b) 5281 x 3491                  (c) 1291 x 592                     (d) 9250 x 29

(a) We have, 578 x 161 578 $\to$ 600                 [rounding off to nearest hundreds] 161 $\to$ 200 [rounding off to nearest hundreds] $\therefore$ Estimated product = 600 x 200 = 1,20,000 (b) We have, 5281 x 3491 5281 $\to$ 5000             [rounding off to nearest thousands] 3491 $\to$ 3500                             [rounding off to nearest hundreds] $\therefore$ Estimated product = 5000 x 3500 = 1,75,00,000 (c) We have, 1291 x 592 1291$\to$ 1300              [rounding off to nearest hundreds] 592$\to$ 600                  [rounding off to nearest hundreds] $\therefore$ Estimated product = 1300 x 600 = 7,80,000 (d) We have, 9250 x 29 9250$\to$9000               [rounding off to nearest thousands] 29 $\to$30              [rounding off to nearest tens] $\therefore$ Estimated product = 9000 x 30 = 2,70,000
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