Question

Preston reads for 20 minutes each night and practices his math facts for 5 minutes each night. After several days, he had practiced maths facts for 45 minutes. How many minutes did Preston read in the same time period?

Answer 1

He read for 180 minutes.

You can find that because every time he practises math for five minutes, he reads for 20, and 45 is 5, 9 times. So you multiply 20 by 9.