问题 填空题
将下列分数化成小数,小数化成分数.
21
100
=______
9
10
=______
63
1000
=______
0.23=______0.45=______0.307=______.
答案

21
100
=0.21
9
10
=0.9
63
1000
=0.063

0.23=

23
100
0.450=
450
1000
0.307=
307
1000

故答案为:0.21,,09,0.063,

23
100
45
100
307
1000

解答题
单项选择题