问题 解答题
化简下面各比
21:35
5
6
4
9
2
3
3
9
36:2.
答案

(1)21:35,

=(21÷7):(35÷7),

=3:5;

(2)

5
6
4
9

=(

5
6
×36):(
4
9
×36),

=30:16,

=(30÷2):(16÷2),

=15:8;

(3)

2
3
3
9

=(

2
3
×9):(
3
9
×9),

=6:3,

=(6÷3):(3÷30,

=2:1;

(4)36:2,

=(36÷2):(2÷2),

=18:1.

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