Modeling Multiplication & Division

Question

class starts at 9:30 and finishes at 10:15. spend twice the time in math class, at 1:10, what time they finish math?

Answer 1

9:30 to 10:15 is 45 min

Twice that time in math class would mean 45 × 2=90 min

From 1:10 to 1hr and 30min after that, is 2:40

2:40 is when math class finishes

Answer 2

9:30 to 10:14 is 45 minutes. Twice that is 90 minute or 1 hour and 30 minutes.

1:10 plus 1 hour and 30 minutes is 2:40.