Roberto and Valerie are jumping rope at recess. Roberto can skip 4,200 times an hour. Valerie can skip 80 times a minute. If they jump rope for fifteen minutes straight, how many skips will they total?
Let’s work this out in a step by step way to be sure we have the right answer.
2250
Roberto skips 70 times per minute because 4,200 / 60 = 70.

Together they skip 150 times a minute.

They will skip 2,250 times because 150 x 15 = 2,250.

.

The answer: 2250