53 + 4 =
57
18 - 3 =
15
150 - 13 + 17 =
154
33 + 27 =
60
500 - 98 =
402
16 + 8 - 24 =
0
91 + 99 =
190
99 - 88 =
11
49 - 9 + 1 =
41
15 + 6 =
21
32 - 15 =
17
121 - 36 + 13 =
98
33 + 34 =
67
45 - 23 =
22
67 - 27 + 60 =
100