20 ×
4
5
2 ÷
1
2
7 +
3
6 ×
2
3 -
1
15 ×
3
5
4
3
4
1 -
5
4 +
1
2 ÷
2
4 -
5
6 ×
2
4
3
1
1
3
8 ×
2
4
5
5