The best estimate is, obviously, the exact value, which is 217557 since any other estimate will be inferior.
Since the operation is multiplication a workable estimate is obtained by rounding one number down and the other one up. This would give 3100*70 = 217000.
a baby
69 = 3 x 23
3 x 23 = 69
58,167
A reasonable estimate for 83*69 is 80*70 = 5600.The true figure, for comparison, is 5727.
210,000
69 multiplied by 21 is 1,449.
a baby
69 = 3 x 23
3 x 23 = 69
58,167
69 = 3 x 23
A reasonable estimate for 83*69 is 80*70 = 5600.The true figure, for comparison, is 5727.
1,932
Their product: 5451.
sexual intercourse is not involved in the 69, but for pleasure its ok...
The answer will depend on what you wish to do with the estimate. If, for example, you wished to divide by 101, I would suggest leave it as it is because 1313/101 = 13. On the other hand, if multiplying by 69, I suggest a good estimate is 1300. Then 1313*69 is approximated by 1300*70 = 91000.