题目内容
(2010?成都模拟)
=
=9:
( ) |
20 |
3 |
4 |
12
12
=6
6
÷8=75
75
%分析:(1)根据分数的基本性质,分子分母同时扩大5倍,
=
;
(2)
=
=9:12;
(3)
=
=6:8;
(4)先用分子除以分母再化成百分数就行,
=3÷4=0.75=75%.
3 |
4 |
15 |
20 |
(2)
3 |
4 |
9 |
12 |
(3)
3 |
4 |
6 |
8 |
(4)先用分子除以分母再化成百分数就行,
3 |
4 |
解答:解:
=
=9:12=6÷8=75%.
故答案为:15,12,6,75.
15 |
20 |
3 |
4 |
故答案为:15,12,6,75.
点评:此题主要考查小数、分数、比以及除法的关系,找到已知具体数逐个转化即可.
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