0.9+1.9+29.9+399.9+4999.9

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】按钮,