Ej 1 :3/7 + 4/5+6/2 = 30/70 + 56/70 + 210/70 = 296/70
Ej 2 :4/3 + 6/8 + 7/9 = 288/216 + 162/216 + 168/216 = 618/216
Ej 3 :3/6 + 5/10 + 8/4 = 120/240 + 120/240 + 480/240 = 720/240
Ej 4 :2/6 + 4/12 + 10/5 = 120/360 + 120/360 + 720/360 = 960/360
Ej 5 :7/2 + 5/7 + 11/10 = 490/140 + 100/140 + 154/140 = 744/140
