2021年2019年中考数学复习同步练习含答案:第1单元数与式分式.pdf
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1、2016 全新精品资料-全新公文范文-全程指导写作-独家原创1/5.精品文档.2019年中考数学复习同步练习含答案:第1单元数与式分式第 4 课时分式一、分式的概念及性质1.下列分式中,属于最简分式的是()A.B.D.2.若分式在实数范围内有意义,则实数x 的取值范围是()A.x=0 B.x 工 5.x 工 0 D.x=5 3.(2018 莱芜)若 x,y 的值均扩大为原的3 倍,贝 U 下列分式的值保持不变的是()A.B.D.4.(2018 甘肃)使得代数式有意义的x 的取值范围是5.若分式的值为 0,贝 U x=_.二、分式的化简及求值6.(2018 天津)计算一的结果为()A.1 B.3
2、.D.7.(2018 威海)化简(a-1)+(-1)?a 的结果是()|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页,共 6 页2016 全新精品资料-全新公文范文-全程指导写作-独家原创2/5A.-a2 B.1.a2 D.-1 8.(2018 内江)已知:一=,则的值是()|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页,共 6 页文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D
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7、 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6
8、D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B
9、4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8.精品文档.2016 全新精品资料-全新公文范文-全程指导写作-独家原创3/5A.B.-.3 D.-3 9.(2018 北京)如果 a-b=2,那么代数式(一 b)?的值为()A.B.3D.410.(2018湖州)当 x=1时,分式的值是?11.(2018襄阳)计算:=?12.(2018包头)化简:+(-1)=?13.(
10、2018?绥化)当 x=2时,代数式(+X)+的值是14.(2018山西)化简:?15.(2018甘肃)计算:+(-T)?16.(2018益阳)化简:(X-y+)?.17.(2018陕西)化简:(-)18.(2018 舟山)化简并求值:(一)?,其中 a=1,b=2.19.(2018 牡丹江)先化简,再求值:?-,其中 x=2.20.(2018 湘潭)先化简,再求值:(1+)+,其中 x=3.|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页,共 6 页文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编
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14、C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H
15、8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL
16、3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H
17、8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8.精品文档.2016 全新精品资料-全新公文范文-全程指导写作-独家原创4/521.(2018 龙东地区)先化简,再求值:(a-)+,其中 a=,b=1.22.(2018 安顺)先化简,再求值:+(-x-2),其中|x|=2.23.(2018 眉山)先化简,
18、再求值:(一)+,其中 x 满足x2-2x-2=0.24.(2018 广安)先化简,再求值:+(a-1-),并从-1,0,1,2 四个数中,选一个合适的数代入求值.25.先化简(1)+,然后从不等式2x-4<0 的非负 整数解中选取一个合适的解代入求值.答案1.B 2.B 3.D 4.x 3 5.-3 6.7.A 8.9.A 10.11.12.或 13.3 14.原式=.15.原式=.16.原式=x.17.原式=.18.原式=a-b,当 a=1,b=2 时,原式=-1.19.原式=,当 x=2 时,原式=.20.原式=x+2,当 x=3 时,原式=5.21.原式=a b,|精.|品.|可
19、.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页,共 6 页文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H8文档编码:CA7D9A3F10S1 HB5C6D10H8B4 ZL3D8P1H8H
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