Răspuns:
23/9-9/4=92\36-81/36=11/36
17/12-3/8=34/24-9/24=25/24
2/3+3/5=10/15+9/15=19/15
16/3+13/9=48/9+13/9=61/9
3/8+9/5=15/40+72/40=87/40
1/2+8/11=11/22+16/22=37/22
3/2+5/6=18/12+10/12=28/12=14/6=7/3
9/7-4/5=45/35-28/35=27/35
21/4+5/8=42/8+5/8=47/8
Explicație pas cu pas:
am amplificat fiecare fracție și am adus la același numitor
