2 ×
1
9 +
4
5
1 -
3
2
2
2 -
3
7 +
4
2 ÷
1
5 ÷
5
9 +
4
5
3
2
1
5
1 -
1
2
1 -
4
3
6 ×
3
2
1
1
20 ×
5
4