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Question
Estimate each of the following products by rounding off the first number downwards and the second number upwards: 578 × 369
Solution
578 estimated downwards = 500
369 estimated upwards = 400
∴ The required product = (500 × 400) = 200000
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Estimate and calculate:
| S.No. | Multiplication fact |
Actual value | Estimated value | Difference |
| 1. | 35 × 12 | 420 | 40 × 10 = 400 | 20 |
| 2. | 82 × 28 | |||
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Estimate the following product using the general rule:
1291 × 592
