问题 解答题
求下面各比的比值并化简:
14:21
9
11
3
22
6:
1
6
0.5:2.5.
答案

(1)14:21,

=14÷21,

=

2
3

14:21,

=(14÷7):(21÷7),

=2:3.

(2)

9
11
3
22

=

9
11
÷
3
22

=6;

9
11
3
22

=(

9
11
×22):(
3
22
×22),

=18:3,

=6:1.

(3)6:

1
6

=6÷

1
6

=36;

6:

1
6

=(6×6):(

1
6
×6),

=36:1.

(4)0.5:2.5,

=0.5÷2.5,

=0.2;

0.5:2.5,

=(0.5×2):(2.5×2),

=1:5.

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