(-12.4+8.9)-1.3/7(одна целая , 3/7)

Question

(-12.4+8.9)-1.3/7(одна целая , 3/7)

Answer 1

(-12,4 + 8,9) - 1 целая 3/7 = - 4 целых 13/14

1) - 12,4 + 8,9 = - 3,5 = - 3 целых 5/10
2) - 3 5/10 - 1 3/7 = - (3 35/70 + 1 30/70) = - 4 65/70 = - 4 13/14