Question

It is 9:00 A.M. when the math lesson starts, and it lasts for 55 minutes. What time will it be when the math lesson ends?

Answer 1

Just as a side note (as you do not need it for this question), an hour = 60 minutes, not 100 minutes.

Math lessons start at 9:00 A.M., and lasts for 55 minutes. Add 0:55 to 9:00

9:00 + 0:55 = 9:55

9:55 A.M. is when math lessons end.

hope this helps