题目内容
化简比. 100:25 |
| ||||
|
1.25:3. |
分析:根据比的基本性质作答,即比的前项和后项同时乘一个数或除以一个数(0除外)比值不变.
解答:解:100:25,
=(10÷25):(25÷25),
=4:1;
:0.35,
=0.7:0.35,
=(0.7÷0.35):(0.35÷0.35(,
=2:1;
:
,
=(
×51):(
×51),
=5:3;
1.25:3,
=(1.25×100):(3×100),
=125:300,
=(125÷25):(300÷25),
=5:12.
=(10÷25):(25÷25),
=4:1;
7 |
10 |
=0.7:0.35,
=(0.7÷0.35):(0.35÷0.35(,
=2:1;
5 |
51 |
1 |
17 |
=(
5 |
51 |
1 |
17 |
=5:3;
1.25:3,
=(1.25×100):(3×100),
=125:300,
=(125÷25):(300÷25),
=5:12.
点评:此题主要考查了化简比的方法,另外还要注意化简比的结果是一个比,它的前项和后项都是整数,并且是互质数.
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