问题 解答题
求比值
15:
1
4
35%:4
4
5
8
9
0.4小时:45分.
答案

(1)15:

1
4

=15÷

1
4

=15×4,

=60;

(2)35%:4,

=

7
20
:4,

=

7
20
÷4,

=

7
20
×
1
4

=

7
80

(3)

4
5
8
9

=

4
5
÷
8
9

=

4
5
×
9
8

=

9
10

(4)0.4小时:45分,

=24分:45分,

=24÷45,

=

8
15

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