Question: Adah practiced the cello for a total of 7.5 hours last week. He practiced for 86 minutes on each of 2 days. How many minutes in total did he practice on the other days? Think carefully first, then make a decision:
7.5 hours = 450 minutes. Two days = 2 * 86 = 172 minutes. 450 - 172 = 278 minutes. Adah practiced a total of 278 minutes on the other days. So the answer is 278.