Estimate the following :
49×49
Estimating:
The estimated value of 49=50, as the unit place digit is 9>5.
Therefore, the estimated value of 49×49 is given by 50×50.
50×5000+2502500
Therefore, the estimated value of 49×49 is 2500.
Estimate the following product :
Estimate the following result:
39x311.
968x539.
912-568
Estimate the sum of 34 and 49 to nearest tens.