(7-2 2/5 / 8/15) / 5 5/8​

(7 - 2 2/5 : 8/15) : 5 5/8 = 4/9

1) 2 2/5 : 8/15 = 12/5 × 15/8 = (3-3)/(1-2) =

9/2 = 4 1/2

2) 7 - 4 1/2 = 6 2/2 - 4 1/2 = 2 1/2

3) 2 1/2 : 5 5/8 = 5/2 : 45/8 = 5/2 × 8/45 =

(1-4)/(1-9) = 4/9

ОТВЕТ:4/9.

4/9

Пошаговое объяснение:

1) 2 2/5 : 8/15 = 12/5 : 8/15 = 12/5 * 15/8 = 3/1 * 3/2 = 9/2 = 4 1/2

2) 7 - 4 1/2 = 6 2/2 - 4 1/2 = 2 1/2

3) 2 1/2 : 5 5/8 = 5/2 : 45/8 = 5/2 * 8/45 = 1/1 * 4/9 = 4/9