Răspuns :
4/12+3/12=7/12
3/12+6/12 = 9/12 se poate simplifica prin 3 = 3/4
8/12+3/12=11/12
7/12+3/12=10/12 se simplifica prin 2 = 5/6
3/12+6/12 = 9/12 se poate simplifica prin 3 = 3/4
8/12+3/12=11/12
7/12+3/12=10/12 se simplifica prin 2 = 5/6