Question

It takes Susana 10 seconds to complete 5 math

problems. How many math facts can she complete
in 35 seconds?

Answer 1

If you understand what I wrote you can get the answer.

Explanation:

First find how long it takes her for each problem which is 10 seconds / 5 problems = 2 seconds per problem. Then take 35 seconds and divide it by 2 seconds which gives the number of problems she did in 35 seconds.