Addition
123+156=
279
855-300=
555
9 - _ = 3
6
9 + 3 = 10 + _
2
345+90=
435
739-516=
223
18 + _ = 47
29
19 - 7 = 15 - _
3
568+124=
692
853-229=
624
37 + _ = 100
63
25 + _ = 30 + 30
35
378+255=
633
900-540=
360
360 + _ =400
40
35 - _ = 65 - 50
20
529+693=
1,222
600-207=
393
698 + __ = 945
247
35 + 75 = _ + 25
85