Пошаговое объяснение:
№7
8 8/15 - 5 9/20 = 8 32/60 - 5 27/60 =
3 5/60 = 3 1/12
№3
7 3/4 - 5/12 = 7 9/12 - 5/12 = 7 4/12 = 7 1/3
№4
8 5/16 - 3/20 = 8 25/80 - 12/80 = 8 13/80
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Verified answer
Пошаговое объяснение:
№7
8 8/15 - 5 9/20 = 8 32/60 - 5 27/60 =
3 5/60 = 3 1/12
№3
7 3/4 - 5/12 = 7 9/12 - 5/12 = 7 4/12 = 7 1/3
№4
8 5/16 - 3/20 = 8 25/80 - 12/80 = 8 13/80