Question

John bought a bicycle that cost $259. He gave the cashier three $100 bills. How much change did he receive? John wants to check if the answer is reasonable by rounding. To what place should he round? Why?

Answer 1

The answer is 41 and he should round to 40 because 40 is close to 41

Answer 2

He received $41 of change, and yes his answer would still be reasonable when rounded because you would round by the nearest tenth so $40. Just one digit away from the actual answer.