Автор - evilehina

это изиииииииииииииии

Ответ

Автор - rina2403k
1. 31/60+(7/20+11/60)=31/60+21/60+11/60=63/60=21/20=1 1/20
2. 53/54-(1/6+7/9)=53/54-(9/56+42/56)=53/54-51/54=2/54=1/27
3. 13/35+(23/35-2/7)=13/35+(23/35-10/35)=13/35+15/35=28/35=4/5
4. 7/16-(3/4-5/16)=7/16-(12/16-5/16)=7/16-7/16=0

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