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