12 ×
3
1 -
4
10 ×
2
5
2 ÷
1
4
5
2 -
3
1
2
2 ×
2
1
20 ×
5
4
12 ×
3
6 +
5
9 +
3
2 ÷
1
2
4
1
2
4
15 ×
3
5