practical math

7 children play the piano.
8 children play flute.
5 children do not play an instrument
How many fewer children do not play an instrument?

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  1. 7 + 8 = 15
    15 - 5 = ?

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    Ms. Sue
  2. How is the answer 10? The 15 total all play instruments. The balance of 10 are of students who "play" instruments.

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