题目内容

【题目】分数、百分数、小数互化. 例:=0.5=50%

=   =   

   =   =12.5%

   =0.1=   

=   =   

   =   =37.5%

   =0.05=   

=   =   

   =   =62.5%

   =0.04=   

=   =   

   =   =87.5%

   =0.02=   

=   =   

=   =   

【答案】

解:=0.25=25%

=0.125=12.5%

=0.1=10%

=0.2=20%

=0.375=37.5%

=0.05=5%

=0.75=75%

=0.625=62.5%

=0.04=4%

=0.4=40%

=0.875=87.5%

=0.02=2%

=0.6=60%

=0.8=80%

【解析】

试题分析:百分数化小数的方法:去掉百分号,把小数点向左移动两位;

百分数化分数的方法:先写成分数的形式,再进一步化简成最简分数

小数化百分数的方法:小数点向右移动两位,同时填上百分号;

小数化分数的方法:一位小数表示十分之几,两位小数表示百分之几,三位小数表示千分之几…先写成分数的形式,再进一步化简成最简分数;

分数化小数的方法:用分数的分子除以分母即得小数商,除不尽时通常保留三位小数;

分数化百分数的方法:先把分数化成小数,再进一步化成百分数;据此进行计算互化即可.

解:=0.25=25%

=0.125=12.5%

=0.1=10%

=0.2=20%

=0.375=37.5%

=0.05=5%

=0.75=75%

=0.625=62.5%

=0.04=4%

=0.4=40%

=0.875=87.5%

=0.02=2%

=0.6=60%

=0.8=80%

练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网