Answer:
1. substract
2. add
3. substract
4. substract
5. add
6. substract
7. substract
8. add
9. add
10. substract
Explanation:
1. you did it
2. -15.68
3. -2.91
4. 3.29
5. -19.55
6. -13.15
7. 17.31
8. -4.5
9. 11.58
10. 0.73
there might have some errors