а) (11/12) (24/55) = 264/660 = 44/110 = 22/55б) 9 (13/18) = 117/18 = 6 целых 9/18 = 6 целых 1/2в) (1/12) (2 1/2) - (5/12) (2 1/2) + (2/15) (2 1/2)= (1/12) (25/12) - (5/12) (25/12) + (2/15) (25/12)= 25/144 - 125/144 + 50/180= -100/144 + 50/180= -5/6 + 5/9= -15/18 + 10/18= -5/18
а) (11/12) (24/55) = 264/660 = 44/110 = 22/55
б) 9 (13/18) = 117/18 = 6 целых 9/18 = 6 целых 1/2
в) (1/12) (2 1/2) - (5/12) (2 1/2) + (2/15) (2 1/2)
= (1/12) (25/12) - (5/12) (25/12) + (2/15) (25/12)
= 25/144 - 125/144 + 50/180
= -100/144 + 50/180
= -5/6 + 5/9
= -15/18 + 10/18
= -5/18