| A | B |
| 1/5 + 3/5= | 4/5 |
| 1/3 + 1/2= | 2/6 + 3/6= 5/6 |
| (-3/2) +(-5/2)= | -8/2= -4 |
| 2/3 + 1/4= | 8/12 + 3/12= 11/12 |
| 4/5 + (-3/7)= | 28/35 +(-15/35)= 13/35 |
| 3 + (-1/5)= | 15/5 + (-1/5)= 14/5= 2 4/5 |
| 2 1/2 +1/3= 5/2 + 1/3 | 15/6 + 2/6= 17/6= 2 5/6 |
| 2/5 + (-1 1/2)=2/5+ -3/2= | 4/10+ (-15/10)=-11/10=-1 1/10 |
| 5/2 + 11/4= 10/4 + 11/4= | 21/4 = 5 1/4 |
| 4/1 + (-1/4)= 16/4+ (-1/4)= | 15/4 = 3 3/4 |
| 5 + 3 1/7= | 8 1/7 |
| -2 1/3 + (-3/-2)= -7/3 + (-3/2)= -14/6 + (-9/6)= | -23/6 = -3 5/6 |
| 15/4 + 1/5= 75/20 + 4/20= | 79/20= 3 19/20 |
| 1 1/7 + 3/4= 8/7+ 3/4= 32/28 + 21/28= | 53/28 = 1 25/28 |
| -3 1/9 + 7/8= -28/9 + 7/8= -224/72 + 63/72= | -161/72= -2 17/22 |
| 5 + 2 1/2+ | 7 1/2 |
| 2 1/4 + (-1/2)= 1 5/4 + (-2/4)= | 1 3/4 |
| 4 + (1/5)= 3 5/5 + (-1/5)= | 3 4/5 |
| 3/5 + 15/5= 18/5= | 3 3/5 |
| -3/4 +(-1/4)= -4/4= | -1 |