问题 解答题
把下面的分数化成小数,你发现了什么规律?
1
2
=
1
20
=
9
20
=
1
4
=
3
4
=
1
40
=
1
5
=
2
5
=
3
5
=
答案

1
2
=0.5;
1
20
=0.05;
9
20
=0.45;
1
4
=0.25;
3
4
=0.75;
1
40
=0.025;
1
5
=0.2;
2
5
=0.4;
3
5
=0.6.

单项选择题 共用题干题
单项选择题