1
1
48 ×
3
4
10 ×
5
2
15 ×
5
4
2 ×
1
2
12 ×
3
3
5 ÷
5
6 ×
2
1
4
2
2
1
3
20 ×
4
5
2 ÷
4
2
15 ×
5
3
1