4/7+2/3 = 12/21+14/21 = 26/21 = 1 целая 5/21
1/6+3/4 = 2/12+9/12 = 11/12
1 целая 1/2 + 2 целых 3/4= 3/2+11/4 = 6/4 + 11/4=17/11 = 4 целых 1/4
5 целых 1/6 - 4 целых 2/3 = 31/6-14/3 = 31/6 - 28/6= 3/6=1/2
4/7+2/3 = 12/21+14/21 = 26/21 = 1 целая 5/21
1/6+3/4 = 2/12+9/12 = 11/12
1 целая 1/2 + 2 целых 3/4= 3/2+11/4 = 6/4 + 11/4=17/11 = 4 целых 1/4
5 целых 1/6 - 4 целых 2/3 = 31/6-14/3 = 31/6 - 28/6= 3/6=1/2