1 digit addition/ subtraction
9 + 8
17
10 + 12
22
126 + 762
888
1432 + 921
2353
12 + 6
18
18 - 15
3
654 - 379
275
3,862 + 129
3,991
9 - 4
37 - 14
23
843 + 459
1,302
1,000 + 4,000
5,000
8-4
4
49 + 28
77
593 - 421
172
8,351 + 1,254
9,605
9 + 9
18
89 + 92
181
963 + 963
1,926
8,976 + 5,486
14,462