Explicație pas cu pas:
a) 18:9=18-9-9=9-9=0
b) 21:7=21-7-7-7=14-7-7=7-7=0
c)24:6=24-6-6-6-6=18-6-6-6=12-6-6=6-6=0
d)20:4=20-4-4-4-4-4=16-4-4-4-4=12-4-4-4=8-4-4=4-4=0
e)40:10=40-10-10-10-10=30-10-10-10=20-10-10=10-10=0
f)20:2=20-2-2-2-2-2-2-2-2-2-2=18-2-2-2-2-2-2-2-2-2=16-2-2-2-2-2-2-2-2=14-2-2-2-2-2-2-2=12-2-2-2-2-2-2=10-2-2-2-2-2=8-2-2-2-2=6-2-2-2=4-2-2=2-2=0
