addition/subtraction
27+43
70
4(15)
60
20/5
4
x + 8 = 13
5
x - 9 = 19
28
432-89
343
18(7)
126
60/12
5
x + 15 = 44
29
x - 17 = 55
72
99+82
181
23(10)
230
144/16
9
x + 26 = 92
66
x - 76 = 13
89
177-124
53
17(11)
187
78/6
13
x + 39 = 146
107
x - 44 = 201
245
726+622
1,348
25(33)
825
204/12
17
349
x - 102 = 11
113