0.9+1.9+29.9+399.9+4999.9=0.9+0.1-0.1+1.9+0.1-0.1+29.9+0.1-0.1+399.9+0.1-0.1+4999.9+0.1-0.1=1-0.1+2-0.1+30+0.1+400-0.1+5000-0.1=5433-0.1*5=5433-0.5=5432.5很高兴为您解答!请点击下面的【选为满意回答】按...