浙江省2019年中考数学复习第一章数与式第三节整式及其运算课前诊断测试.doc

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1第三节 整式及其运算课前诊断测试1. (2018四川绵阳中考)下列运算正确的是( )Aa 2a3a 6 Ba 3a 2a 5C(a 2)4a 8 Da 3a 2a2(2018湖南衡阳中考)下面运算结果 a6的是( )Aa 3a 3 Ba 8a2Ca 2a3 D(a 2)33(2018山东威海中考)已知 5x3,5 y2,则 52x3y ( )A. B1 C. D.34 23 984(2018四川达州中考)已知 am3,a n2,则 a2mn 的值为_5(2018浙江金华中考)计算(x1)(x1)的结果是_ _.6计算:8999011_7(2018山东临沂中考)已知 mnmn,则(m1)(n1)_参考答案1C 2.B 3.D4. 5.x 21 6.810 000 7.192

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