Brad placed several calls on his cell phone during the first

Brad placed several calls on his cell phone during the first half of the month. The calls were 15 minutes, 46 minutes, 59 minutes, 83 minutes, and 114 minutes. If his plan authorizes 400 minutes, how many minutes does he have left?

A. 47

B. 83

C. 113

D. 147

Solution

B. This problem has two steps. First you need to add the number of minutes Brad used. Then you need to subtract that amount from his allocation of 400 minutes. The total number of minutes used was 317, so subtracting that from 400 leaves 83 minutes.