addition
21+37
58
273+531=
804
23-18=
5
223-156=
67
9x7=
63
14+14=
28
359+426=
785
33-21
8
333-256=
77
21x4=
84
17+41=
58
112+754=
866
48-25=
23
632-321=
311
23x25=
575
62+54=
116
550+321
871
82-57=
25
1258-389=
869
47x32=
1,504
73+25=
98
937+452=
1,389
93-47=
46
4736-1257=
3,479
123x23=
2,829