additions
12 plus 12
24
900 - 200
700
3/4 - 2/4
1/4
5/5 plus 3/3
8/8
4 times 4
16
4 plus 8
12
400 - 200
200
8/8 - 5/5
3/3
10/10 plus 9/9
19/19
4 times 8
32
45 plus 2
47
2,000 - 1,000
1,000
9/9 - 1/1
8/8
6/6 plus 6/6
12/12
3 times 10
30
99 plus 1
100
300 - 200
100
10/10 - 2/2
8/8
20/20 plus 10/10
30/30
4 times 5
20
100 plus 200
300
7,000 - 5,000
2,000
12/12 - 3/3
9/9
100/100 plus 500/500
600/600
12 times 3
36