Addition
524+243=?
767
567-345=
222
12x3=
36
789-180=
169
225+330=
555
786-345=
441
9x11=
99
560+314=
874
670+240=
910
240-109=
131
12x5=
60
6x8=
48
452+367=
819
435-156=
279
9x7=
63
987-103=
884
980+875=
1855
411
9x9=
81
12x12=
144