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Ответ:

Пошаговое объяснение:

1) 1 - 1/2 = 1/2

2) 1/2 + 1/4 = 2/4 + 1/4 = 3/4

3) 3/4 - 3/4 = 0

4) 3*(7,5+2,5) = 3*10=30

5) 0:10 = 0

ответ: 0

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в)

1) 1 1/2 : 1 3/4 = 3/2 : 7/4 = 3/2 * 4/7 = 6/7

2) 8 3/5+2 2/5 = 10 5/5 = 11

3) 11 + 6/7 = 11 6/7

4) 1/7 * (15,5 - 7,2) = 1/7 * 8,3 = 1/7 * 83/10 = 83/70

5) 11 6/7 : 83/70 = 83/7 * 70/83 = 10

ответ: 10

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