12 +
9 +
4
1 -
5 +
2 ÷
7 ÷
7 +
126×
1 -
5 +
6 ÷
7
30 ×
1 -
7 +
12 ×
3 ÷
6 -
14 ×
90 ×
12 +
24 ×