adding two digit numbers
79+74
153
93-47
46
312+253
565
826-273
553
4975+1675
6650
92+86
178
84-36
48
382+295
677
657-194
463
4317+4197
8514
92+24
116
81-39
42
438+625
1063
497-264
233
9474-4675
4799
93+95
188
92-21
71
285+935
1220
947-324
623
4357-1357
3000
73+93
166
80-28
52
735+214
949
987-245
742
6795+3167
9962