Question

4. Duane and Roberto joined a rock-a-thon

to help raise money for the local animal
shelter. Duane rocked for 10-hours and
Roberto rocked for 13-hours. How much
longer did Roberto rock than Duane?

Answer 1

roberto rocked for 3 more hours

Explanation:

13-10=3

Answer 2

Roberto rocked 3 hours longer than Duane.