1
1
10 ×
2
5
3
3
4 ÷
4
20 ×
5
18 ×
3
2
4 ÷
4
1
4
20 ×
5
3
1
6 ×
2
6 ×
2
4
5 ÷
1
5
3
3
4 ÷
1
4
10 ×
2
5