30.0-29.1+29.2-29.3+29.4
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
29.2-29.3= -0.1
0.9-0.1+29.4=0.8+29.4=30.2