把百分?jǐn)?shù)化成分?jǐn)?shù)或整數(shù).
7.8%=________ 300%=________ 0.1%=________ 150%=________.
1.5%=________ 10%=________ 5%=________ 1%=________.
0.078 3 0.001 1.5 0.015 0.1 0.05 0.01
分析:分?jǐn)?shù)化百數(shù),分母是100的分?jǐn)?shù),直接改寫(xiě)成百分?jǐn)?shù)號(hào)即可,即去掉分母,添上百分號(hào)(%);一般分?jǐn)?shù)化百分?jǐn)?shù),首先把分?jǐn)?shù)化成小數(shù),再把小數(shù)點(diǎn)向右移動(dòng)兩位,添上百分號(hào)(%)即可,如果不能化成有限小數(shù),根據(jù)需要取近似值,一般百分號(hào)前保留一位小數(shù).
解答:7.8%=0.078,
300%=3,
0.1%=0.001,
150%=1.5,
1.5%=0.015,
10%=0.1,
5%=0.05,
1%=0.01.
故答案為:0.078,3,0.001,1.5,0.015,0.1,0.05,0.01.
點(diǎn)評(píng):本題是考查百分?jǐn)?shù)化小數(shù),屬于基礎(chǔ)知識(shí),一定要記。