Addition
420+335
755
485-233
252
11x2
12 divided by 2
6
Fancy C word
Commutative
448+223
571
999-298
701
300x2
600
20 divided by 2
10
500+600
1,100
200+485
685
657-387
270
20x4
80
40 divided by 1
40
4 divided by 2
2
187+13
200
1,000-887
223
10x10
100
200 divided by 2
100
9x9
81
485+374
859
887-496
391
12x12
144
24 divided by 2
12
500+800
1,300