题目内容
化简比,结果用分数表示.
|
0.8:0.04= |
|
|
|
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:
:
,
=(
×6):(
×6),
=
;
0.8:0.04,
=
:
,
=(
×25):(
×25),
=
;
吨:750千克,
=
:
,
=(
×8):(
×8),
=
,
小时:75分钟,
=
:
,
=(
×4):(
×4),
=
;
:
,
=(
×
):(
×
),
=
.
| 5 |
| 6 |
| 1 |
| 2 |
=(
| 5 |
| 6 |
| 1 |
| 2 |
=
| 5 |
| 3 |
0.8:0.04,
=
| 4 |
| 5 |
| 1 |
| 25 |
=(
| 4 |
| 5 |
| 1 |
| 25 |
=
| 20 |
| 1 |
| 1 |
| 8 |
=
| 1 |
| 8 |
| 3 |
| 4 |
=(
| 1 |
| 8 |
| 3 |
| 4 |
=
| 1 |
| 6 |
| 1 |
| 2 |
=
| 1 |
| 2 |
| 5 |
| 4 |
=(
| 1 |
| 2 |
| 5 |
| 4 |
=
| 2 |
| 5 |
| 72 |
| 25 |
| 32 |
| 125 |
=(
| 72 |
| 25 |
| 125 |
| 8 |
| 32 |
| 125 |
| 125 |
| 8 |
=
| 45 |
| 4 |
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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化简比,结果用分数表示.
| 0.8:0.04= |