2 digit addition
23+45=
68
54-21=
33
123+214=
337
542-321=
221
987+456=
1,443
57+22
79
68-12=
56
310+280=
590
915-404=
511
657+738=
1,395
38+18
56
71-46=
25
268+457=
725
851-579=
272
849+592=
1,441
74+18=
92
83-68=
15
736+187=
923
902-658=
244
723+889=
1,612
83+17=
100
60-29=
31
829+164=
993
740-495=
245
964+777=
1,741