Addition 2 digit
40 + 37 =
77
308 + 450 =
758
825 - 621 =
204
12 + 13 - 20 =
5
15 + 25 =
40
419
38
573 - 248 =
325
34
48 + 26 =
74
721
66 - 18 =
48
456
33 + 17 - 24 =
26
63 + 17 =
80
198 + 175 =
373
87 - 19 =
68
500 - 372 =
128
79 + 16 - 18 =
77
58 + 42 =
100
598 + 189 =
777
100 - 62 =
38
604 - 178 =
426
153 + 47 - 132
68