当前位置:首页 > 八年级 > 数学试卷

【329294】《二次根式的加减乘除》同步练习3

时间:2025-01-21 12:53:37 作者: 字数:1164字

二次根式的乘除,加减习题

1.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 时, <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

2.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 都是最简二次根式,则 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

3. 计算: <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

4. 计算: <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

5. 长方形的宽为 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> ,面积为 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> ,则长方形的长约为 (精确到0.01)。

6. 下列各式不是最简二次根式的是( )

A.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> B.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> C.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> D.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>



7. 已知 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> ,化简二次根式 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 的正确结果为( )

A.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> B.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> C.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> D.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

8. 对于所有实数 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> ,下列等式总能成立的是( )

A.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> B.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

C.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> D.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

9.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 的大小关系是( )

A.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> B.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> C.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> D. 不能确定

10. 对于二次根式 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> ,以下说法中不正确的是( )

A. 它是一个非负数 B. 它是一个无理数

C. 它是最简二次根式 D. 它的最小值为3

11. 计算:

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

12. 化简:

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

13. 把根号外的因式移到根号内:

 <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>







二次根式的乘除答案:

1.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 2. 123. 184. -55. 2.83

6——10DDCAB

11.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

12.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 13.  <a href="/tags/48/" title="练习" class="c1" target="_blank">练习</a> <a href="/tags/50/" title="同步" class="c1" target="_blank">同步</a> <a href="/tags/153/" title="乘除" class="c1" target="_blank">乘除</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>