Пошаговое объяснение:
1 2/30+3 5/12+1 7/12+4 7/20=
(1+3+1+4)+(2/30+5/12+7/12+7/20)=
9+17/12=9+1 5/12=9+1+5/12=10+5/12=10 5/12
60-(34 7/18-20 41/54)=
60-(619/18-1121/54)=
60-368/27=1252/27=46 10/27
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Пошаговое объяснение:
1 2/30+3 5/12+1 7/12+4 7/20=
(1+3+1+4)+(2/30+5/12+7/12+7/20)=
9+17/12=9+1 5/12=9+1+5/12=10+5/12=10 5/12
60-(34 7/18-20 41/54)=
60-(619/18-1121/54)=
60-368/27=1252/27=46 10/27