2018-2019学年中考数学专题复习 分式的混合运算（含解析）

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1、分式的混合运算一、单选题1.计算的结果是（ ）A. 1                                       B.                                        C.                                        D. 2.化简的结果是（ ）A.                                       B.                                       C.            

2、                           D. 3.如果（）2÷（）2=3，那么a8b4等于（  ）A. 6                                          B. 9                                          C. 12                                          D. 814.化简的结果是（   ）A. 1                                       B. 5

3、                                       C. 2a+1                                       D. 2a+55.计算的结果是（  ）A.                                     B.                                     C. a﹣b                                    D. a+b6.化简（1﹣）÷的结果是（  ）A. （x+1）2    

4、                         B. （x﹣1）2                             C.                              D. 7.若分式□运算结果为x，则在“□”中添加的运算符号为（  ）A. +                                      B. ﹣                                      C. +或×                                      D. 

5、﹣或÷8.化简（﹣）的结果是（  ）A. x                                        B.                                         C.                                         D. 9.化简：（1+）÷结果为（  ）A. 4x                                          B. 3x                                        

6、  C. 2x                                          D. x10.计算（1+）÷的结果是（  ）A. x+1                                     B.                                      C.                                      D. 11.如果（）2÷（）2=3，那么a8b4等于（  ）A. 6                                

7、          B. 9                                          C. 12                                          D. 8112.化简的结果是（　 ）A.                                         B.                                         C.                                         D. 13.下列等式

8、成立的是（  ）A. +=                B. =                C. =                D. =﹣14.化简的结果是（   ）A.                                    B.                                    C.