(2,5-2/1,3)×(-5/1,7)+1/1,3:(-5,6​

Ответ:

Пошаговое объяснение

(2,5-2 1/3)×(-5 1/7)+1 1/3:(-5,6​)= -1 2/21

1) 2,5 - 2 1/3 = 2 1/2 - 2 1/3 = 2 3/6 - 2 2/6 = 1/6

2) 1/6 *(5 1/7) = 1/6 * (-36/7) = -6/7

3) 1 1/3 :(-5,6) = 4/3 : (-28/5) = 4/3 * (-5/28) = -5/21

4) -6/7 + (-5/21) = -18/21 - 5/21 = -23/21 = -1 2/21