10 ×
2
5
4 ÷
1
4
3 ÷
3
12 ×
4
3
10 ×
2
5
1
20 ×
5
4
15 ×
3
2 ÷
1
8 ×
2
3 ÷
3
2 ×
1
5
2
4
1
2
4
4
15 ×
3
5