人教六年级求比值和化简比练习.doc

<p>求比值和化简比练习（一）班级： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;姓名： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;

一、 知识要点： &nbsp; &nbsp; &nbsp;
1、比的意义：
&nbsp; &nbsp; &nbsp; 比是用来表示两个数量之间的关系，两个数相除，又叫做两个数的比。
2、 比的基本性质：
&nbsp; &nbsp; &nbsp;比的前项和后项同时乘或除以一个相同的数（0除外）比值不变。
（为此可以进行比的化简）
3、 求比值：
&nbsp; &nbsp; &nbsp;用比的前项除以后项（比值通常用分数表示，也可以用整数或小数 表示；不能除尽就用最简分数表示。）
4、 化简比： &nbsp;
&nbsp;化简比就是把一个比变成前项和后项都是整数的，并且前项和后项的公因数只有1。
5、化简比的结果用比的形式或分数两种表示
二、求比值：（比值通常分数表示，也可以用整数或小数表示）
1、整数比整数 &nbsp; &nbsp; 36：18 &nbsp; &nbsp; &nbsp; 24：30 &nbsp; &nbsp; &nbsp; 15：105 &nbsp; &nbsp; &nbsp;35：120

&nbsp; &nbsp; &nbsp;

2、小数比小数 &nbsp; &nbsp; &nbsp; &nbsp;0.6：0.24 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0.36：0.095

3、 分数比分数 &nbsp; ：= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ：=

4、小数比分数 &nbsp; 0.3: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0.45: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; :0.75 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;:0.75 &nbsp;

三、化简比：（化简比的结果用比的形式或分数两种表示）
1、整数比整数 &nbsp; 32：18 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;196:48 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 162：84

3:12 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 21:24 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 36:72 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 36:18 &nbsp;

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
2、 小数比小数 &nbsp; 0.125：0.25 &nbsp; &nbsp; &nbsp; &nbsp;7.8：3.9 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0.1：0.04

&nbsp;1.01:101 &nbsp; &nbsp; &nbsp; &nbsp; 3.14:28.26 &nbsp; &nbsp; &nbsp; &nbsp; 3.6:1.2 &nbsp; &nbsp; &nbsp; &nbsp; 4.9:0.7

3、 分数比分数 &nbsp; ： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;： &nbsp; &nbsp; &nbsp;

&nbsp;： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;：27 &nbsp; &nbsp; &nbsp; &nbsp; ：16 &nbsp; &nbsp; &nbsp; &nbsp;2：

求比值和化简比练习 &nbsp; &nbsp;班级 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;姓名 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
一、求比值：
36：18 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;24：30 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 15：105 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 21：63 &nbsp; &nbsp;
&nbsp;

0.6：0.24 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0.36：0.095 &nbsp; &nbsp; &nbsp; &nbsp; 0.36：0.095 &nbsp; &nbsp; &nbsp; &nbsp; 0.75:2.5

: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; : &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; :

: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 4: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; :9 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;:2

二、化简比：
&nbsp;32:18 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;196:48 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 162:84

:27 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; :16 &nbsp; &nbsp; &nbsp; &nbsp;

2: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.125:0.25 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 7.8:3.9 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.1:0.04

4、 整数比小数 &nbsp; 10：0.8 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1：0.5 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 9.1：182

5、 分数比小数 &nbsp; ：2.5 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0.125： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;： 1.5

6、 整数比分数 &nbsp; ：27 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;：16 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2：

7、 单位比 &nbsp; &nbsp;2.5千克：400克 &nbsp; &nbsp; &nbsp;400厘米：6米 &nbsp; &nbsp; &nbsp; 500毫升：1升 &nbsp; &nbsp;

&nbsp;20千克：吨 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;30分钟：小时 &nbsp; &nbsp; &nbsp; &nbsp; 308立方厘米：2立方分米</p>