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【329998】14.3整式的除法

时间:2025-02-07 09:16:33 作者: 字数:1763字

 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

14.3整式的除法

随堂检测

1 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>  <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> 都是正整数,且 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> ),这就是,同底数幂相除,底数 ,指数

2、计算: <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

3、下列计算正确的是(   )

A <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> B <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

C <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> D <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

4下列关于数与式的等式中,正确的是(   )

A <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>    B <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>    C <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>   D <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

5、计算: <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

典例分析

例题:若 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> ,求 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> 的值

分析:由已知想求出未知数x的值显然是困难的,仔细观察,题目也未要求确定未知数x的值,不妨将 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> 当作整体,用换元法解之,看所求值的式子中是否多项式 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> 的倍数。

解:由 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> 可得 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

由因为 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>  <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> 代入,得 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

课下作业

拓展提高

1、下列计算错误的是 ( )

A2m + 3n=5mn B <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

C <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> D <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

2、若 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> ,则 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> =

3、若 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> ,求 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> 的值





4、计算①  <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>





5、若 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> ,求 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> 的值。








体验中考

1、(重庆綦江)计算a3÷a2的结果是( )

Aa5 Ba-1 Ca Da2

2、(重庆)计算 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> 的结果是( )

A <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> B <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> C <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> D <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

3、(湖南怀化)下列运算正确的是( )

A <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> B <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> C <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> · <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> D <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>





















参考答案

随堂检测

1 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> ,不变,相减

2、原式 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

3C

4A

5、原式 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>  <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>  

课下作业

拓展提高

1 A

2 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>  <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

3 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>  <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

4、① <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>  <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>  <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

5、解: <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

= <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

= <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

= <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a> 代入,得 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

所以原式= <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

 <a href="/tags/194/" title="除法" class="c1" target="_blank">除法</a>

体验中考

1C

2B

3D