Question

Помогите решить. Это дроби.
7 10/15 - (3 9/20 + 1 1/30) = ...?

Answer 1

7 10/15 - (3 9/20 + 1 1/30) = 2 11/15.
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1) 3 9/20 + 1 1/30= 3 27/60 + 1 2/60 = 4+28/30= 4 28/30= 4 14/15.
2) 7 10/15 - 4 14/15= 6 25/15 - 4 14/15 = 2+ 11/15= 2 11/15.

Answer 2

я помог ?