题目内容
把下面的比化成最简整数比,并求出比值.
(1)0.75:
|
(2)3.6:0.36. |
分析:(1)根据比的基本性质作答,即比的前项和后项同时乘或除以一个数(0除外)比值不变;
(2)用比的前项除以后项即可.
(2)用比的前项除以后项即可.
解答:解:(1)0.75:
;
=
:
;
=(
×8):(
×8);
=6:1;
0.75:
;
=
:
;
=
÷
;
=6;
(2)3.6:0.36,
=(3.6×100):(0.36×100),
=360:36,
=(360÷36):(36÷36),
=10:1;
3.6:0.36,
=3.6:0.36,
=10.
1 |
8 |
=
3 |
4 |
1 |
8 |
=(
3 |
4 |
1 |
8 |
=6:1;
0.75:
1 |
8 |
=
3 |
4 |
1 |
8 |
=
3 |
4 |
1 |
8 |
=6;
(2)3.6:0.36,
=(3.6×100):(0.36×100),
=360:36,
=(360÷36):(36÷36),
=10:1;
3.6:0.36,
=3.6:0.36,
=10.
点评:此题主要考查了化简比和求比值的方法,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;而求比值的结果是一个商,可以是整数、小数或分数.
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把下面的比化成最简整数比,并求出比值.
(1)0.75:; | (2)3.6:0.36. |