1、人教八年级数学上册分式的运算第十五章 分式15.2 分式的运算15853425432)1(631097259275)2(651210435245325432)3(1445279529759275)4(把除数的分子分把除数的分子分母颠倒位置后母颠倒位置后,再与被除式相乘。再与被除式相乘。?)1(dcba?)2(dcbabdacdcba )1(bcadcdbadcba )2(dbcadcba cbdacdbadcba 3234xyyxcdbacab43222223234xyyx 233264xyxxy 222342bacdcab 222324baccdab acd32 ababba34941632
2、axyxaxyyxaxy10385128151222yxyxxyyxxy232323222291643abbayxaxy28512xyxy3232 26332xbbb xx；424.323xaax 11b aa b；2baba；2ba3x2283xa411244)1(222 aaaaaa)2)(2(1)1()2(22 aaaaa)2)(2()1()1()2(22 aaaaa)2)(1()2(aaammm71491)2(22 1749122mmm 1)7()7)(7(1 mmmm)7)(7()7(mmmm mm 7 整式与分式整式与分式 运算时，可以运算时，可以把整式看成分把整式看成分母是母是1
3、的分式的分式xxxxxxx222223344233442222xxxxxxx)2)(1()1()1)(3()2)(2(xxxxxxxx)1)(3()2(xxxx32222xxxx3592533522 xxxxx3539253522 xxxxx353)35)(35(352 xxxxxx)35)(35(3)35)(35(2 xxxxxx322x )3()2)(3(312)3(22 xxxxxx22 xxxxxxxx 36)3(446222)3(631446222 xxxxxxxba?)(2 ba?)(3 ba?)(10 babbaabababa222)(bababababa333)(baba101010)(babababan)(nnbabbbaaa nnnbaba)(22)32)(1(cba 2333222)2(acdacdba22)32)(1(cba 222)3()2(cba 22494cba 2333222)2(acdacdba223933642acaddcba 6338cdba 2233332)2(2)()(acadcdba
