0.9+1.9+29.9+399.9+4999.9
问题描述：
0.9+1.9+29.9+399.9+4999.9
答
你好：
0.9+1.9+29.9+399.9+4999.9
=（1-0.1）+（2-0.1）+（30-0.1）+（400-0.1）+（5000-0.1）
=1+2+30+400+5000-0.1-0.1-0.1-0.1-0.1
=5433-0.5
=5432.5
答
=1+2+30+400+5000-0.1×5=5433-0.5 =5432.5
答
0.9+1.9+29.9+399.9+4999.9
=0.9+1.9+29.9+399.9+4999.9+0.5-0.5
=(0.9+0.1)+(1.9+0.1)+(29.9+0.1)+(399.9+0.1)+(4999.9+0.1)-0.5
=1+2+30+400+5000-0.5
=5432.5
肯定对 望采纳
答
0.9+1.9+29.9+399.9+4999.9=5432.5
答
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...