题目内容
把下列各比写成分数形式 9:8= |
|
| ||||||
12:0.8= |
|
| ||||||
|
0.45:
|
1.5:1.2= | ||||||
50:0.5= |
4:20= |
7:0.01= |
分析:根据比与分数的关系,比的前项相当于分数的分子,比号相当于分数线,比的后项相当于分数的分数的分母,化成分数后再根据分数的基本性质,把分数化简即可.
解答:解:9:8=
,
:0.75=0.625:0.75=
=
,
:
=
÷
=
×
=
,
12:0.8=
=
=
,
:1.5=0.375:1.5=
=
=
,
:1=
÷1=
,
:
=
÷
=
×
=
,
0.45:
=0.45:0.75=
=
=
,
1.5:1.2=
=
=
,
50:0.5=
=
=
,
4:20=
=
,
7:0.01=
=
.
故答案为:
,
,
,
,
,
,
,
,
,
,
,
.
8 |
9 |
5 |
8 |
625 |
750 |
5 |
6 |
3 |
8 |
2 |
9 |
3 |
8 |
2 |
9 |
3 |
8 |
9 |
2 |
27 |
16 |
12:0.8=
12 |
0.8 |
120 |
8 |
15 |
1 |
3 |
8 |
0.375 |
1.5 |
375 |
1500 |
1 |
4 |
9 |
111 |
9 |
111 |
9 |
111 |
1 |
5 |
5 |
8 |
1 |
5 |
5 |
8 |
1 |
5 |
8 |
5 |
8 |
25 |
0.45:
3 |
4 |
0.45 |
0.75 |
45 |
75 |
3 |
5 |
1.5:1.2=
1.5 |
1.2 |
15 |
12 |
5 |
4 |
50:0.5=
50 |
0.5 |
500 |
5 |
100 |
1 |
4:20=
4 |
20 |
1 |
5 |
7:0.01=
7 |
0.01 |
700 |
1 |
故答案为:
8 |
9 |
5 |
6 |
27 |
16 |
15 |
1 |
1 |
4 |
9 |
111 |
8 |
25 |
3 |
5 |
5 |
4 |
100 |
1 |
1 |
5 |
700 |
1 |
点评:本题主要是考查比与分数之间的关系,属于基础知识,要掌握.
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