Question

Sela's piano class starts at 4:30.The lesson is 50 minutes long when does her lesson end

Answer 1

4:30+50=5:20 because one hour is 60 minutes so 50+30=80, so there is a new hour. 80-60=20

Answer 2

If her piano class starts at 4:30 and last 50 minutes you will add 4:30+50. Therefore her piano class will end at 5:20