Решить! (5 целых 4/5-7 целых 2/3): (- 2 целых 4/5)

(5 4/5 - 7 2/3) : (-2 4/5) = 2/3
1) 5 4/5 - 7 2/3 = 5 4/5 + (-7 2/3) = -7 2/3 + 5 4/5 = -7 10/15 + 5 12/15 =
= -6 25/15 + 5 12/15 = -1 13/15
2) -1 13/15 : (-2 4/5) = -28/15 * (-5/14) = -2/3 * (-1/1) = 2/3