Question

Calculează: 23/9-9/4=?,17/12-3/8=?,2/3+3/5=?,16/3+13/9=?,3/8+9/5=?,1/2+8/11=?,3/2+5/6=?,9/7-4/5=?,21/4+5/8=?​

Answer 1

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