60 ×
4
6 +
1
5
5 +
2
3
5
3
2 ×
2
1
80 ×
4
6 ×
3
2 ÷
2
1
4
5
2
1 -
4
3
15 ×
5
2 ÷
1
10 +
1
5
4
3
2