Question

Выполните действие. (-45-47)*(5целых79-7целых1112)

Answer 1

(-4/5 - 4/7) * (5 7/9 - 7 11/12) = 2 целых 14/15

1) -4/5 - 4/7 = -(28/35 + 20/35) = -48/35 
2) 5 7/9 - 7 11/12 = -(7 11/12 - 5 7/9) = -(7 33/36 - 5 28/36) = -2 5/36
3) -48/35 * (-2 5/36) = 48/35 * 77/36 = (8*11)/(5*6) = 88/30 = 2 28/30 = 2 14/15