八年级数学上册分式的乘除法20.docx

1、八年级数学上册分式的乘除法209a 16b6b2 17a6x2y7xy 5b 4y9xy 9x7(xy) bm mb xy9a9b 17a2b3 6ab a2b2 36y2x2 x6yx216xy64y2 x28xy 7x 2 x5x3 25x29 5x35x2 y36y 7xab3 9ab8c2 8c3da24a4 a3a26a9 a24 6 781m2 m29m9a 14b4b3 13a18xy4xy3 5b 8y26xy 9x9(xy) ny yn xy3a3b 25ab 6ab a2b2 4y2x2 x2yx28xy16y2 x24xy 4x 9 x2x4 4x216 2x46x3 y

2、25y2 5x3ab 5a2b2cd 6c2da24a4 a2a24a4 a24 1 936m2 m26m7a 20b2b3 11a20x3y8x2y 5a 4y6xy 7x8(xy) ax xa xy9a9b 17ab3 10ab a2b2 4y2x2 x2yx26xy9y2 x23xy 9x 4 x5x6 25x236 5x64x3 y25y 8x3a2b 3a2b28c 6c2da22a1 a1a22a1 a21 2 29m2 m23m7a 18b4b3 19a318xy3x2y2 7b 2y3xy 3x2(xy) bx xb xy9a9b 13ab2 8ab a2b2 81y2x2 x

3、9yx210xy25y2 x25xy 5x 2 x5x1 25x21 5x17x2 y6y 4xab2 5a2b24cd 6cda26a9 a1a22a1 a29 6 449m2 m27m3a 16b8b3 15a8xy9xy3 5b 8y7xy 7x6(xy) am ma xy3a3b 24a2b 8ab a2b2 16y2x2 x4yx24xy4y2 x22xy 4x 8 x3x1 9x21 3x15x y24y3 2xa3b 5ab5c2d 6cda26a9 a3a25a6 a29 1 79m2 m23m7a 18b2b3 17a320x3y4xy 5a 4y34xy 9x9(xy) n

4、y yn xy5a5b 15ab 8ab a2b2 49y2x2 x7yx28xy16y2 x24xy 5x 9 x3x3 9x29 3x37x y6y 9x3a3b2 3a2b2cd 6cda26a9 a1a23a2 a29 4 89m2 m23m5a 10b4b3 19a14x3y4xy2 9b 4y6xy 5x7(xy) nx xn xy5a5b 29a3b 2ab a2b2 36y2x2 x6yx210xy25y2 x25xy 9x 7 x3x6 9x236 3x69x2 y8y2 6xa3b2 5a3b27cd 2cda22a1 a3a26a9 a21 4 79m2 m23m5a 1

5、0b6b2 15a320xy7x3y 5b 8y7xy 9x5(xy) ny yn xy3a3b 13a2b3 10ab a2b2 16y2x2 x4yx24xy4y2 x22xy 4x 7 x5x5 25x225 5x57x2 y26y 4xab3 9a2b22c3d 8c3da26a9 a3a26a9 a29 6 525m2 m25m9a 16b2b 15a22x2y3x3y2 5a 2y6xy 9x8(xy) ny yn xy9a9b 17ab3 4ab a2b2 25y2x2 x5yx218xy81y2 x29xy 8x 4 x3x3 9x29 3x32x y33y2 3xab 3a2

6、b37c2d 4c3da22a1 a2a25a6 a21 8 136m2 m26m5a 16b8b 15a14x3y5x2y2 3a 6y39xy 7x8(xy) ax xa xy3a3b 12ab 8ab a2b2 25y2x2 x5yx28xy16y2 x24xy 5x 8 x3x9 9x281 3x96x2 y7y3 5x3a2b3 9a3b26cd 4cda26a9 a2a24a4 a29 5 581m2 m29m3a 16b8b 11a38x2y8xy3 7b 6y9xy 3x8(xy) nm mn xy5a5b 27ab3 6ab a2b2 4y2x2 x2yx218xy81y2

7、x29xy 5x 3 x5x3 25x29 5x36x2 y27y2 4xa2b3 3a3b37c3 4cda26a9 a3a26a9 a29 6 59m2 m23m5a 12b2b 11a310x2y3x2y3 5a 8y7xy 3x5(xy) ax xa xy5a5b 3a3b2 6ab a2b2 81y2x2 x9yx214xy49y2 x27xy 9x 6 x4x5 16x225 4x55x2 y36y2 2xa2b 3ab34cd 4c2da22a1 a3a25a6 a21 6 816m2 m24m7a 18b4b3 11a14xy8x3y 9a 4y9xy 7x4(xy) nx x

8、n xy5a5b 21a3b 6ab a2b2 4y2x2 x2yx28xy16y2 x24xy 4x 6 x4x4 16x216 4x44x2 y23y2 9xab 5ab26cd 2cda24a4 a1a24a3 a24 9 236m2 m26m9a 20b8b 17a312x2y9xy2 3a 8y35xy 3x8(xy) ny yn xy9a9b 30a3b 2ab a2b2 9y2x2 x3yx212xy36y2 x26xy 2x 3 x4x4 16x216 4x45x y24y3 7xa3b2 3a3b5cd 4c2da26a9 a1a22a1 a29 7 225m2 m25m5a 14b4b2 11a214xy6x3y3 5a 2y9xy 7x8(xy) nx xn xy7a7b 3ab 10ab a2b2 16y2x2 x4yx26xy9y2 x23xy