12/3 + 11/2 =1/7 + 2/14 =2/5 + 3/10 =2/2 + 7/4 = 2/4 + 4/5 =​

1) 12/3 + 11/2 = 4/1 + 11/2 =8/2 + 11/2 = 19/2 = 9 1/2

2) 1/7 + 2/14 = 1/7 + 1/7 = 2/7

3) 2/5 + 3/10 = 6/10 + 3/10 = 9/10

4) 2/2 + 7/4 = 1/1 + 7/4 = 4/4 + 7/4 = 11/4 =

2 3/4

5) 2/4 + 4/5 = 1/2 + 4/5 =5/10 + 8/10 = 13/10 = 1 3/10