14/15
Пошаговое объяснение:
1) 7/8 * 6. 2/5 = 7/8 * 32/5 = 7/1 * 4/5 = 28/5 = 5. 3/5
2) -5. 1/3 + 5. 3/5 =
-5. 5/15 + 5. 9/15 = 4/15
3) 4/15 : 4/5 = 4/15 * 5/4 =
5/15
4) 3/5 + 5/15 = 9/15 + 5/15 = 14/15
