7.85
37.68 nearly = 40.
4.8 nearly = 5
So 37.68/4.8 nearly = 40/5 = 8
Actually, it is 7.85. So the estimate is less than 2% off the correct value.
because you get a whole number
12,825
119.3333
6.9877
4.9048
28
rounding
because you get a whole number
12,825
Front end estimation is simpler but usually more crude.
Front end rounding is using the first or the first two digits to make an estimation. 37145 would be rounded to 40000.
rounding:9lb+63lb=about 72lb
This when you are rounding off 43210 copy,56789 add 1
Not in this case.
9 + 63 = 72 lbs.
by adding or subtracting the values of the digits in the front place
23.3043