Помогите с матем пжж)))))))

Question

Помогите с матем пжж)))))))

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Answer 1

1) 15*1 + 15*1/3 - 15*1/5 = 15 + 15*1/1*3 - 15*1/1*5 = 15 + 5 - 3 = 7

2) 48 * 19/24 - 48* 7/12 + 48 * 3/8 = 48*19/1*24 - 48*7/1*12 + 48*3/1*24 = 38-28+18 = 28