-8/15
Пошаговое объяснение:
2 1/2= 5/2
13/15m - 3/4m + 1/12m = 13/15*5/2 - 3/4*5/2 + 1/12*5/2 = 13/10 - 15/8 + 5/24 = 156/120 - 225/120 + 25/120 = (156-225+5)/120= -64/120 = -8/15
-8/15
Пошаговое объяснение:
2 1/2= 5/2
13/15m - 3/4m + 1/12m = 13/15*5/2 - 3/4*5/2 + 1/12*5/2 = 13/10 - 15/8 + 5/24 = 156/120 - 225/120 + 25/120 = (156-225+5)/120= -64/120 = -8/15