Choose the correct estimated sum and underline the letter of the correct answer.
1) 20.75
+ 33. 23
A. 44
B. 34
C. 24
D. 54
2) 81.92
+13.95
A. 76
B. 66 C. 86
C. 86 D. 96
3) 25.44
+67.95
A. 73
B. 63 C.83 D. 93​
Pls help me