12+34
46
67-8
59
11x3
33
132+56
186
76-23
53
9x9
81
214+364
578
876-67
809
12x12
144
1,342+234
1,576
8,369-500
7,869
11x12
132
12,987+4,354
17,341
9,347-2,575
6,772
13x12
156