Автор - AdelinaRay

3 2/5 * 1 4/7 + 2 3/7 * 3 2/5 - 13 3/5 * 1/2

Ответ

Автор - Шерлоck
3 2/5*1 4/7=17/5*11/7=119+55/35=174/35=4 34/35
2 3/7*3 2/5=17/7*17/5=119+85/35=204/35=5 29/35
13 3/5*1/2=68/5*1/2=34/5=6 4/5=6,8
174/35+204/35=378/35=10,8
10,8-6,8=4

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