17 +
10 +
320×
12 +
2 ÷
2 -
4 -
392×
30 ×
18 +
12 ×
1
28 +
4 +
20 ×
8 ×
9 +
18 ×
14 +
210×
15 +
4
21 ×
8
8 +
2 ÷