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18 March, 02:50

Sam can solve 30 multiplication problems in 2 mins. How many can he solve in 20 mins.

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Answers (2)
  1. 18 March, 03:16
    0
    To get to 20 minutes from 2 minutes you multiply by 10, do the same to the 30 problems to get 300. The answer is 300 problems in 20 minutes.
  2. 18 March, 03:17
    0
    To find the answer using unit rates, you do 30 divided by 2 which is 15/1. Then do 15*20 which is 300. So he can do 300 problems in 20 minutes.
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