10 целых 11/12 - (м+3 целых 2/15)=6 целых 4/15

(15- 4 целых 3/20)-(12-3 целых 8/15)=

10 11/12 -(m+3 2/15) = 6 4/15 m+ 3 2/15 = 10 11/12 - 6 4/15m+3 2/15=4 55-16/60m+3 2/15=4 39/60m=4 39/60 - 3 2/15 m=1 39-8/60m=1 31/60______________________________________________________1) 14 20/20 - 4 3/20= 10 16/202)11 15/15- 3 8/15 = 8 7/153) 10 16/20- 8 7/15 = 2 48-28/60 = 2 20/60 =2 1/3