北京市各区2016年中考数学一模汇编整式20190221261.doc

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1、1北京市 2016 年各区中考一模汇编整式一、整式之幂运算1.【2016 东城一模,第 02 题】下列运算中,正确的是A xx3=x3B( x2)3=x5 C 624x D( x-y)2=x2+y22.【2016 通州一模,第 03 题】下列各式运算的结果为 6a的是A 3a B 3() C 3a D 12a二、整式之因式分解3.【2016 东城一模,第 08 题】对式子 241a进行配方变形,正确的是A ()3B23(1)aC2D4.【2016 东城一模,第 11 题】分解因式: 2abc=5.【2016 丰台一模,第 11 题】分解因式:2 x3-8x =6.【2016 平谷一模,第 11

2、 题】分解因式: 28y=7.【2016 朝阳一模,第 12 题】分解因式: 22369ab_8.【2016 海淀一模,第 11 题】分解因式: 229.【2016 西城一模,第 11 题】分解因式: 34ab=_二、整式之因式简化10.【2016 平谷一模,第 18 题】已知 a+b=1,求代数式 212aba的值11.【2016 通州一模,第 11 题】已知 3mn, 2,那么 2mn的值是 详细解答1. C2. C3. D4. ()abc5. 2x (x+2)(x-2)6. 2y7. )38. (1ba9. ab(b+2)(b-2)10. 解: 22ba= 2+2= 21a3 a+b=1,原式= b4=2511. 6

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