问题 解答题
化简下列各比:
48:64
4.5:6.9
4
3
:1
1
7

220cm:1.1m
1.5升:720毫升
15:30:20
1
2
2
3
5
6

1天:18小时:360分.
答案

(1)48:64

=(48÷16):(64÷16),

=3:4;

(2)4.5:6.9,

=(4.5×10):(6.9×10),

=45:69,

=(45÷3):(69÷3),

=15:23;

(3)

4
3
:1
1
7

=

4
3
8
7

=(

4
3
×
21
4
):(
8
7
×
21
4
),

=7:6;

(4)220cm:1.1m,

=220cm:110cm,

=220:110,

=(220÷110):(110÷110),

=2:1;

(5)1.5升:720毫升,

=1500毫升:720毫升,

=1500:720,

=(1500÷60):(720÷60),

=25:12;

(6)15:30:20,

=(15÷5):(30÷5):(20÷5),

=3:6:4;

(7)

1
2
2
3
5
6

=(

1
2
×6):(
2
3
×6):(
5
6
×6),

=3:4:5;

(8)1天:18小时:360分,

=24小时:18小时:6小时,

=24:18:6,

=(24÷6):(18÷6):(6÷6),

=4:3:1.

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