Circle all the problems with sums less than 5. Then find the exact sums of only the problems you circled....

Circle all the problems with sums less than 5. Then find the exact sums of only the problems you circled.
1. 0.24 + 4.25
2. 4.8 + 0.16
3. 2.31 + 2.075
4. 2.31 + 2.7
5. 0.909 + 4.09
6. 3.99 + 1.109
7. 2.675 + 2.325
8. 3.775 + 0.225
9. 2.06 + 2.933
10. 2.6 + 2.933
11. 1.809 + 3.091
12. 3.01 + 1.991
13. 1.83 + 3.1 + 0.1
14. 0.012 + 3.79 + 1.101
15. 2.6 + 2.04 + 0.099
16. What strategies did you use to solve the problems?