Question

公園栽有一些楊樹(shù)和松樹(shù)，如果楊樹(shù)棵數(shù)的

3

4

=松樹(shù)棵數(shù)的

2

3

，那么楊樹(shù)棵數(shù)（　�。┧蓸�(shù)棵數(shù)．

A．＞

B．=

C．＜

D．≥

Answer 1

分析：根據(jù)楊樹(shù)棵數(shù)的

3

4

=松樹(shù)棵數(shù)的

2

3

，列出等式：楊樹(shù)棵數(shù)×

3

4

=松樹(shù)棵數(shù)×

2

3

，進(jìn)一步用松樹(shù)的棵數(shù)表示楊樹(shù)的棵數(shù)，求得問(wèn)題的解．

解答：解：楊樹(shù)棵數(shù)×

3

4

=松樹(shù)棵數(shù)×

2

3

，
楊樹(shù)的棵數(shù)=松樹(shù)的棵數(shù)×

2

3

÷

3

4

，
楊樹(shù)的棵數(shù)=松樹(shù)的棵數(shù)×

2

3

×

4

3

，
楊樹(shù)的棵數(shù)=松樹(shù)的棵數(shù)×

8

9

，
即楊樹(shù)是松樹(shù)的

8

9

，楊樹(shù)是8份，松樹(shù)是9份，所以楊樹(shù)的棵數(shù)小于松樹(shù)的棵數(shù)．
故選：C．

點(diǎn)評(píng)：解答此題的方法靈活，可以把楊樹(shù)棵數(shù)×

3

4

=松樹(shù)棵數(shù)×

2

3

=1，分別求出比較即可；也可利用分?jǐn)?shù)的意義解答，所取得份數(shù)相同，分得份數(shù)多的數(shù)就大．