问题 解答题
求比值.
12.75:1.25
7
2
30
7
答案

12.75:1.25,

=1275÷125,

=51÷5,

=10

1
5

7
2
30
7

=

7
2
÷
30
7

=

7
2
×
7
30

=

49
60

选择题
判断题