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Estimate the following products using general rule: (a) 578 x 161 (b) 5281 x 3491 (c) 1291 x 592 (d) 9250 x 29 |
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Answer» (a) 578 x 161 578 round off to 600 161 round off to 200 The estimated product = 600 x 200 = 1,20,000 (b) 5281 x 3491 5281 round of to 5,000 3491 round off to 3,500 The estimated product = 5,000 x 3,500 = 1,75,00,000 (c) 1291 x 592 1291 round off to 1300 592 round off to 600 The estimated product = 1300 x 600 = 7,80,000 (d) 9250 x 29 9250 round off to 10,000 229 round off to 30 The estimated product = 10,000 x 30 = 3,00,000 |
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