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Question
Estimate each of the following products by rounding off each number to the nearest ten: 42 × 75
Solution
42 estimated to the nearest ten = 40
75 estimated to the nearest ten = 80
∴ The required estimation = (40 ×× 80) = 3200
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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 | |||
| 3. | 16 × 12 | |||
| 4. | 23 × 27 |
Estimate the product 758 × 6784 using the general rule.
Estimate the following product using the general rule:
3858 × 7682
