Răspuns:7/12-5/12=2/12=1/6
3/4-1/5=15/20-4/20=11/20
7/8-5/6=21/24-20/24=1/24
1-3/7=7-3/7=4/7
3-7/10=30-7/10=23/10
3 si 5/12-1 si 3/8=41/12-11/8=82/24-33/24=49/24
7 si 3/10-3 si 7/15=73/10-52/15=219/30-104/30=115/30=23/6
17/18-4/9-1/6=17/18-8/18-3/18=6/18=1/3
Explicație pas cu pas:cred ca asa
