Помогите решить пример!

Question

Помогите решить пример!

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Answer 1

7 1/2 * (-1/5) + (-1 2/3) * (-9/10) - 17 29/30 = -17 29/30

1) 7 1/2 * (-1/5) = - 15/2 * 1/5 = -3/2 = -1 1/2

2) -1 2/3 * (-9/10) = 5/3 * 9/10 = 3/2 = 1 1/2

3) -1 1/2 + 1 1/2 = 0

4) 0 - 17 29/30 = -17 29/30