问题 解答题
求比值.
13:39
1
4
1
6
1
2
:0.6
答案

(1)13:39,

=13÷39,

=

1
3

(2)

1
4
1
6

=

1
4
÷
1
6

=

3
2

(3)

1
2
:0.6,

=0.5:0.6,

=0.5÷0.6,

=

5
6

单项选择题
判断题