Question

Elisa finished her math assignment in 1/2 hours. Then she completed her chemistry assignment in 1/5 hours. What was the tot amount of time Elsa spent doing these two assignments? Write your answer as a fraction in simplest form.

Answer 1

1/2+1/5 = 5/10+2/10= 7/10

You have to make the denominator the same so you multiply the numerator and denominator.

1/2•5= 5/10
1/5•2=2/10