1)2+2/7=14/7+2/7=16/7
2)2 3/7+2/7=17/7+2/7=19/7
3)2 3/7+1 2/7=17/7+9/7=26/7
4)2 3/7+6/7=17/7+6/7=23/7
5)2 3/7 + 1 6/7=17/7+13/7=30/7
а)3 3/12+2/12=36/12+3/12+2/2=41/12
б)3 3/12 + 1 5/12=39/12+17/12=56/12
в)3 3/12 +11/12=39/12+11/12=50/12
г)3 3/12 + 1 11/12=39/12+23/12=62/12