Question

The rainfall for the last three months of school was 4.98 inches, 9.27 inches, and 0.62 inches. Estimate the total rainfall for the three months by using front-end estimation.
1. about 14 in
2. about 47 in.
3. about 15 in.
4. about 16 in.

Answer 1

The first thing you should do is add the whole numbers of each month:
 4 + 9 + 0 = 13
 The second is to round the decimals to the nearest whole number:
 0.98 + 0.27 + 0.62
 0.98 is approximately 1
 0.27 + 0.62 = 0.89
 0.89 is approximately 1
 We have then:
 0.98 + 0.27 + 0.62 is approximately 2.
 Then, we add both numbers:
 13 + 2 = 15
 answer:
 the total rainfall for the three months by using front-end estimation is
 3. about 15 in.