Помагите 1целая 5\12 -7\10

Question

Помагите 1целая 5\12 -7\10

Answer 1

1 5/12 - 7/10 = 17/12 - 7/10 = 85/60 - 42/60 = 43/60

Comments

а 7 7\8 - 1 9\10=

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Подскажи

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= (7 - 1) + (7/8 -9/10)= 6 + (70/80-72/80) = 5+(150/80-72/80) = 5 78/80 = 5 39/40

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Ответ: 5 39/40

Answer 2

1 5/12  -  7/10 = 17/12  -  7/10 =  (17 × 5  -  7 × 6)/60 = 85/60  -  42/60 =  43/60

Comments

а 7 7\8 - 1 9\10 Подскажи