分式的约分、通分专项练习题(最新整理)

1、分式的约分、通分经典练习题1. 不改变下列分式的值，使分式的分子、分母首相字母都不含负号。3y - - x- x - y -x - 2 y- x + y- x - y约分练习：1根据分数的约分，把下列分式化为最简分式：8a 212a=;125a 2bc345ab 2c26(a + b)2=13(a + b)26a + b=13a 2 - b 2 = 2、约分3a3b3c(x + y)yx 2 + xyx 2 - y 212ac 2xy 2(x + y)2(x - y)23、约分：；(1).x 2 - 25x 2 - 5x(2).a 2 + 4a + 3a 2 + a - 6(3)- 32a3b

2、 2c24a 2b3d(4)- 15(a + b)2- 25(a + b)(5)a 2 - ab a - b；(6)x 2 - x - 2；4 - x 22b - ab4.约分 a 2 - 2a(a + b)2 - c 2a + b + c6x 2 y + 2xy 29x 2 - y 216a 4b 2c512a3b 4c 22a + 2b 4a 2 - 4b 2m3 + 2m2 + mm2 - 12 y(2 y - x)46x(x - 2 y)315mn2 + 10m2n5mn5.约分（1）x2 + 6x + 9x2 - 9（2）a 2 - 9a 2 - 6a + 9（3）(x + y)(a

3、 - b)3(x + y)2 (a - b)（4）x 2 - 3x - 18x 2 - 9（5）x2 + 4x + 3x2 + x - 6212a3 (y - x)2x2 y + xy22（6）x - 7x（7）（8）（9）1 - x 2（10）m - 2m +149 - x227a(x - y)2xyx 2 - 3x + 21- m6. 约分：(1) ；(2) ；(3) ；(4) （ 5） ；（ 6）；（7） ；（8） (9) ；(10) 7. 先化简，再求值：4x3 y + 12x 2 y 2 + 9xy 34x3 - 9xy 2，其中 x=1，y=1yx14a3c5b通分练习：1. 通分

4、：（1） 2x , 3y 2 , 4xy ； （2）5b 2c,10a 2b。- 2ac 2x12x12x2.通分：（1） (2x - 4)2 , 6x - 3x 2 , x 2 - 4 ，（2） x 2 - 1 , x 2 - 3x + 2 ；3.通分： (1)x - y;2 y 2x + y(2)x3x - 1;-x 2- x - 1（3）14a2, b2ac2（4）9 -a -1,2（5）1,1,1 3a a - 9(a - b)(b - c)(b - c)(c - a)(a - c)(a - b)4通分：（1）y , z2x 3y, 3x 4z；（2）3b 4a3, c6ab- 2a

5、3b 2c；（3） -18x 4 y,23x 2 y 3 z,5。6xz 2y（4）a(x +,x2) b(x + 2)；（5）1,x( y - x)12x - 2 y；（6）52(x - 2),4；3(2 - x)2“”“”at the end, xiao bian gives you a passage. minand once said, people who learn to learn are very happy people. in every wonderful life, learning is an eternal theme. as a professional cler

6、ical and teaching position, i understand the importance of continuous learning, life is diligent, nothing can be gained, only continuous learning can achieve better self. only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. this document is also edited by my studio