Select the best answers.

15.77
+ 17.88
+ 41.58
+ 20.20
9.29
+ 8.34
+ 2.55
+ 47.07
30.40
+ 45.52
+ 49.31
+ 9.94
19.58
+ 43.58
+ 30.87
+ 32.73
40.08
+ 25.10
+ 13.56
+ 46.89