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新人教版八年级数学上册第14章《整式的乘法》计算专题

2020-09-08 来源:易榕旅网
 14.1—14.2整式乘法运算题

一、直接写出答案。

(1)x2·x3 = (2)a·a6 = (3)- x5·x3·x10 = (4)mx-2·m2-x = (5)10x×1000= (6)(-2)×(-2)5×(-2)5 =

(7)(103)6 = (8)(a4)2 = (9)(am)10= (10)-(x4)5= (11)(a2)3·a5 = (12)-(-x2)2= (13)(2a)2 = (14)(-5b)3= (15)(x2y)3= (16)(-3m2)3= (17)(2ab2)3 = (18)-(x2y3z5)2= (19)-8m2n3·3m4n5 = (20)3x2·(-6xy2)= (21)(-5a2b)(-4a)= (22)3x2·6x2= (23)4y·(-2xy2)= (24)(-3x)2·5x3= (25)x8 ÷x3=

(26)(ab)5÷(ab)2= (27)(-a)12÷(-a)5= (28)m8÷m2= (29)(xy)6÷(xy)3= (30)n7÷(-n5)= (31)-8a2b3 ÷ 6ab2= (32)(6×109)÷(2×105)= (33)(4×103)×(5×105)= (34)(_____-4b)(_____+4b)=9a2-16b2 (35)(_____-2x)(_____-2x)=4x2-25y2

二、计算(请写出过程)

1.a2·(-a)5·(-3a)3 2.[(am)n]p 3.(-mn)2(-m2n)3

4.(-3ab)·(-a2c)·6ab2 5.(-ab)3·(-a2b)·(-a2b4c)2

6. (-4a)·(2a2+3a-1) 7. (-2ab2)3·(3a2b-2ab-4b2)

8.(3m-n)(m-2n). 9.(x+2y)(5a+3b). 10.5x(x2+2x+1)-(2x+3)(x-5)

11.-ab2(3a2b–abc-1) 12.(15x3y10xy2)(2xy) 13.(12x2-10xy2)÷4xy

14. 7m(4mp)÷7m

222

15.(0.75x2y3x3y21x4y3)(1x2y)

26216.(2x+2)(2x-2) 17.(a+3b)(a-3b)

18. (-2x-5)(2x-5) 19.(-2x+3)

2

20. 98

2

21.(3x-5)2 - (2x+3)2

23. (2x-3y)(3y+2x)-(4y-3x)(3x+4y)

25. (1x+y)(1x-y)(1x2+y2339)

22. (a-5) 2-(a+6)(a-6)

24. 3(2x+1)(2x-1)-2(3x+2)(2-3x) 26. (1x)(1x)(1x2)(1x4) 27. 28.(ab)(ab)(bc)(bc)(ca)(ca)

29.(2x1)(x2)(x2)2(x2)2,其中x1

1230.(2x+3y)-(2x+y)(2x-y),其中x=1,y=2

2

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