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प्रश्न
First guess the answer and then calculate:
69 × 52 = ?
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उत्तर
On guessing 69 × 52, the numbers will be near to 70 × 50 = 3500
Calculation-
| 60 | 9 | |
| 50 | 60 × 50 | 9 × 50 |
| 3000 | 450 | |
| 2 | 60 × 2 | 9 × 2 |
| 120 | 18 |
By adding the numbers in third and fifth rows you will get
3000 + 450 + 120 + 18 = 3588
So, 69 × 52 = 3588.
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