GAUSS8 2006 Problem 4

Past Contests GAUSS8 GAUSS (GR. 8) - 2006
, ,
1

If 1+1.1+1.11+\Box=4.44, what number should be put in the box to make the equation true?

Answer Choices
A. 3.33
B. 1.23
C. 0.12
D. 2.13
E. 3.21