a girl walks 3/5 of mile in 10 minutes, how far will she walk in 60 minutes

Question

not sure how to explain how to calculate to our son with "new" math

 

Answer 1

Think: she walk 3/5 of a mile in one trip that takes 10 minutes. In 60 minutes she can do 6 trips. So she walks 6(3/5) miles. This equals 18/5 miles. In mixed numbers this is 3 3/5 miles.