题目内容
化简比.
|
0.54:1.6 |
|
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:(1)
:0.375
=
:
=(
×
):(
×
)
=1:
=8:5;
(2)0.54:1.6
=(0.54÷0.02):(1.6÷0.02)
=27:80;
(3)
:
=(
×
):(
×
)
=
:1
=5:3.
3 |
5 |
=
3 |
5 |
3 |
8 |
=(
3 |
5 |
5 |
3 |
3 |
8 |
5 |
3 |
=1:
5 |
8 |
=8:5;
(2)0.54:1.6
=(0.54÷0.02):(1.6÷0.02)
=27:80;
(3)
4 |
15 |
4 |
25 |
=(
4 |
15 |
25 |
4 |
4 |
25 |
25 |
4 |
=
5 |
3 |
=5:3.
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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