adding
1+1=
1+1=2
1-1=
1-1=0
6*5=?
6*5=30
30%5=?
30%5=6
mike has 2 cars he gives 1 car away. how many does he have now?
2-1=1
2+2=
2+2=4
500-100=
500-100=400
20%4=
20%4=5
3+3=
3+3=6
7-6=
7-6=1
400+500=
400+500=900
3-0=
3-0=3
6000+500=
6000+500=6500
6-6=
6-6=0