Addition
1+10
10+1=11
10-1
10-1=9
2x4
2x4=8
20 divided by 2
=10
9x5
45
2+20
2+20=22
20-2
20-2=18
3x6
3x6=18
35 divided by 7
=5
8x7
56
3+30
3+30=33
30-3
30-3=27
4x8
4x8=32
40 divided by 5
=8
9x7
63
4+40
4+40=44
40-4
40-4=36
5x10
5x10=50
100 divided by 10
=10
10x7
70
50+11
50+11=61
50-11
50-11=39
6x12
6x12=72
1000 divided by 10
=100
56 divided by 8
7