15 ×
3
5
2 ÷
2
4 ×
1
4
2 ÷
2
1
4
15 ×
5
3
48 ×
4
3
5 ×
5
12 ×
2
1
1
5 ÷
5
4
1
3
2
1
6 ×
2
3
20 ×
4
5