66 - 40 =
15 / 15 =
84 - 82 =
405 - 101 =
5 x 8 =
7 x 4 =
99 / 3 =
9 +9 + 9 =
21 / 3 =
201 + 34 =
100 x 100 =
26 x 2 =
40
2
52
235
1
7
27
10 000
28
33
304
26
