Estimating quotients with larger numbers calls for a slightly altered strategy from the one we used in the last lesson.
PROBLEM: 3233 / 32 =
STRATEGY:
1) round the dividend to the nearest 1000
2) round the divisor to the nearest 10
3) forget about the remainder
ROUNDED PROBLEM: 3000 / 30 = 100
The actual answer to this problem is 101 r1 and so our estimate of
100 is really fairly close to the actual answer.
Now take a look at these examples.
PROBLEM: 4835 / 58 =
STRATEGY: round divisor to nearest 10, dividend to nearest 1000
and forget about the remainder.
ROUNDED PROBLEM: 5000 / 60 = 83
The actual answer to this problem is 83 r21 which real
close to our rounded answer.
Try a few for yourself!