问题 填空题
求下列比的比值:
18:48       
0.25:3       
5
7
25
49
答案

(1)18:48,

=18÷48,

=

18
48

=

3
8

(2)0.25:3,

=

1
4
:3,

=

1
4
÷3,

=

1
12

(3)

5
7
25
49

=

5
7
÷
25
49

=

5
7
×
49
25

=

7
5

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