Yes reasonable
To estimate the sum of 56 and 58, you can round both numbers to the nearest ten. Rounding 56 to 60 and 58 to 60 gives you an estimated sum of 120. Therefore, the estimate of 56 plus 58 is approximately 120.
8 + 3 = 11 is an estimate for 10 and 2/3
13.3
you have to rounds both numebers up or down to one significant figure1.45 into 1 and o.6 into 1the estimate is 21+1simple math :)
1800
49800
It is 102.207.An estimate might be 87+15 = 102.
16.25
An initial estimate would be 468 .
Notice that each of the three numbers is rather close to 9,000. The estimated sum is 27,000.
The estimated answer is 20.
87 K + 100 K = 187 K The real answer is 2 K less than that. Estimate 185 K.
8 + 3 = 11 is an estimate for 10 and 2/3
13.3
12
40
100 That is an estimate.