新人教版八年级数学上册第14章整式的乘法计算专题
14.1—14.2整式乘法运算题 一、干脆写出答案。 (1)x2·x3 = (2)a·a6 = (3)- x5·x3·x10 = (4)mx-2·m2-x = (5)10 x×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. 13.(12x2-10 xy2)÷4xy 14. 7m(4m2p)2÷7m2 15. 16.(2x+2)(2x-2) 17.(a+3b)(a-3b) 18. (-2x-5)(2x-5) 19.(-2x+3)2 20. 982 21.(3x-5)2 - (2x+3)2 22. (a-5) 2-(a+6)(a-6) 23. (2x-3y)(3y+2x)-(4y-3x)(3x+4y) 24. 3(2x+1)(2x-1)-2(3x+2)(2-3x) 25. (x+y)(x-y)(x2+y2) 26. 27. 28. 29. ,其中 30.(2x+3y)2-(2x+y)(2x-y),其中x=1,y=2 第 2 页