Two Digit Addition
20+20=
40
39+83=
122
83-21=
62
42-26=
16
51+24
25+60=
85
28+84=
112
94-20=
74
27-19=
8
62-40
22
24+71=
95
72+89=
161
82-12=
70
93-49=
44
25+25
50
63+92=
155
28+93=
121
97-46=
51
72-19=
53
48+25
73
28+71=
99
99+99=
198
73-50=
23
90-19=
71
600+300
900