常用的∏倍及分数、小数和百分数的互化表.doc

一、常用的π倍
1π
3。14
5π
15.7
9π
28。26
36π
113。04
2π
6.28
6π
18.84
10π
31。4
49π
153。86
3π
9.42
7π
21.98
16π
50。24
64π
200。96
4π
12.56
8π
25.12
25π
78。5
81π
254。34
二、 常用的分数、小数及百分数的互化
=0。5=50％ =0.25=25％ =0。75=75％
=0.2=20% =0。4=40% =0。6=60％ =0.8=80%
=0.125=12。5% =0。375=37。5% =0.625=62。5% =0。875=87。5%
=0。1=10% =0。0625=6。25％ =0。05=5％ =0.04=4％
=0.02=2％ =0.01=1%