Пошаговое объяснение:
1) = -20/24 - 21/24 = -41/24 = -1 17/24
2) = -6 14/30 - 8 9/30 = -14 23/30
3) = -0,671
4) = -25/70 + 49/70 = 24/70 = 12/35
Пошаговое объяснение:
1) = -20/24 - 21/24 = -41/24 = -1 17/24
2) = -6 14/30 - 8 9/30 = -14 23/30
3) = -0,671
4) = -25/70 + 49/70 = 24/70 = 12/35