《3分式的加减法》习题1.化简(xxxxx2)24222.化简:23xx(25x-x-2)3.化简:abbaabbaba21(222222)4.化简:22193mmm5.(m1+n1)÷nnm+6.24111aaaa7.)11(122xxxx8.化简÷(x-)9.xxxxxxx11212210.2221412211aaaaaa11.222299369xxxxxxx;12.23111xxxx13.2aabab14.2222aaaa15.233aaa16.22111xxx17.先化简,再求值:(1)请你先化简,再选取一个你喜欢的数代入并求值:11)1(212aaaa.(2)14422xxx÷(13x-1),其中x=﹣2.(3)2132·446222xxxxxxx,其中2x.(4)先化简再求值:()xxxxxxxxxx11442412222,其中。18.已知22221111xxxyxxxx,试说明不论x为何值,y的值不变.19.已知x为整数,且222218339xxxx为整数,求所有符合条件的x值的和.