(643)整式的混合运算专项练习99题(有答案有过程)ok
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整式的混合运算专项练习99题(有答案)
(1)﹣(2x2y3)²•(xy)3
(2)5x2(x+1)(x﹣1)
(3)x(y﹣x)+(x+y)(x﹣y);(4)(a+2b)2+4ab3÷(﹣ab).
(5) 3(a2)3•(a3)2﹣(﹣a)2(a5)2(6)(5mn﹣2m+3n)+(﹣7m﹣7mn)(7)(x+2)2﹣(x+1)(x﹣1)
(8)(x+2)2﹣(2x)2;(9)(2a+3b)2﹣4a(a+3b+1).
(10)(﹣2xy2)2•3x2y÷(﹣x3y4)
(11)(x+1)2+2(1﹣x)
(12)(﹣a3)2•(﹣a2)3;
(13)[(﹣a)(﹣b)2•a2b3c]2;
(14);(15)(x3)2÷x2÷x+x3÷(﹣x)2•(﹣x2).(16)(﹣3x2)3•(﹣4y3)2÷(6x2y)3;
(17)(﹣x﹣y)2﹣(2y﹣x)(x+2y)(18)
(19)(a+b)(﹣b+a)+(a+b)2﹣2a(a+b)(20);(21)x(x+1)﹣(2x+1)(2x﹣3);
(22)(2a+3b)2﹣(2a﹣3b)2.
(23)2a2﹣a8÷a6;
(24)(2﹣x)(2+x)+(x+4)(x﹣1)(25)(﹣2ab3)2+ab4•(﹣3ab2);
(26)(2a+3)(2a﹣3)+(a﹣3)2.
(27)12ab2(abc)4÷(﹣3a2b3c)÷[2(abc)3].(28)(﹣2x2)3÷(﹣x)2
(29)(﹣2m﹣1)(3m﹣2)
(30)2x•(﹣x2+3x)﹣3x2•(x+1).
(31)3a•(﹣ab2)﹣(﹣3ab)2.
(32)﹣3x•(2x2﹣x+4)
(33)2x3•(﹣2xy)(﹣xy)3.(34)3(x2﹣2x+3)﹣3x(x+1)=0.(35)(3x+2)(3x+1)﹣(3x+1)2.(36)2a(a+b)﹣(a+b)2.
(37)x(2x﹣7)+(3﹣2x)2.(38)(﹣3x2y)2÷(﹣3x3y2)(39)(a+2)2﹣(a+1)(a﹣1)(40)(a2)4÷a2(41)
.
(42)a(ab2﹣4b)+4a3b÷a2;
(43)(x﹣8y)(x﹣y).
(44)(3x2y)3•(﹣5y);
(45)[(x+y)2﹣y(2x+y)﹣4x]÷2x.(46)(2x+a)2﹣(2x﹣a)2
(47)[(2x2)3﹣6x3(x3+2x2)]÷(﹣2x2)(48)(x﹣2)(x+2)﹣(x+1)(x﹣3)
(49)(2a)3•b4÷12a3b2
(50)(3x﹣1)(2x+3)﹣6x2.
(51)(﹣6x2)2+(﹣3x2)•x﹣27x5÷(﹣9x2)(52)(﹣2y2)3+y•y5
(53)(x+2)2﹣(x+1)(x﹣1)
(54)(a+b)(a﹣b)+(a+b)2﹣a(2a+b)(55)(﹣a)2•(a2)2÷a3
(56)(15x2y﹣10xy2)÷5xy.(57)[(2x2)3﹣6x3(x3+2x2+x)]÷(﹣x)4.(58)(x+1)2+2(1﹣x)﹣x2
(59)(12a3﹣6a2+3a)÷3a
(60)5x2(x+1)(x﹣1)
(61)(b﹣2a)2﹣4a(a﹣b)
(62)(﹣3ab2)3(﹣4ab2)
(63)(3a﹣2)(a﹣6)
(64)(3a3b﹣9a2b2﹣21a2b3)÷(﹣3a2b)
(65)(x+3)(x﹣2)﹣(x﹣2)2
(66)(3x+4y)(3x﹣4y)
(67)(x+3y)(2x﹣y)﹣y(5x+3y)
(68)3(a5)2•(﹣a3)2﹣(2a3)2•(a2)5;(69)4xy+(x﹣2y)2+(x+3y)(3y﹣x)(70)﹣3x2y2•(﹣2xy)2.
(71)(a﹣2b)2+(a+2b)(a﹣2b)
(72).(73).(74)(﹣2xy2)3+(﹣3xy4)(﹣2x2y2)(75)(2x)3×(﹣3xy2)
(76)(a+3b)(a﹣2b)﹣(2a﹣b)2.(77)(﹣2x2y)3+(3x2)2•(﹣x2)•y3.(78)(m2n)3•(﹣m4n)÷(﹣mn)2
(79)(2a﹣1)2(2a+1)2
(80)(x4y+6x3y2﹣x2y3)÷(3x2y)
(81)(2x﹣3y+1)(2x+3y﹣1)
(82)(﹣2x)(4x2﹣2x+1)
(83)(6a3﹣4a2+2a)÷2a
(84)(2x﹣y)(2x+y)﹣(x﹣3y)2
(85)(4x2﹣2x3+6x)÷(﹣2x)﹣(2x﹣1)2.(86).(87)[x(xy2+2xy)﹣y(x2y﹣6x2y2)]÷2x2y.(88)x6÷(﹣x)2﹣(x)2•27x2.(89)(2x+y)(2x﹣3y)+4y(2x+y)(90)(m+2)(m﹣2)+(m﹣1)(m+5)(91)[(x+y)2﹣y(2x+y)﹣8x]÷2x.(92)(2xy2﹣6xy)÷2x+y(y+2)(93)(27a3﹣15a2+6a)÷(3a)
(94)x(x+2y)﹣(x+1)2+2x.
(95)(x2y3)2÷(x3y4)•(﹣4xy)(96)a3•a3+(﹣2a3)2﹣(﹣a2)3.
(97)(2x+1)(x+3)﹣6(x2+x﹣1);
(99)[(2x+y)2﹣y(y+2x)﹣4x]÷2x.(98)[x(x2y2﹣xy)﹣y(x2﹣x3y)]+3x2y.
整式混合运算99题参考答案:
(1)﹣(2x2y3)²•(xy)3
=﹣4x4y6•x3y3
=﹣4x7y9;
(2)5x2(x+1)(x﹣1),
=5x2(x2﹣1),
=5x4﹣5x2.
(3)x(y﹣x)+(x+y)(x﹣y),
=xy﹣x2+x2﹣y2,
=xy﹣y2;
(4)(a+2b)2+4ab3÷(﹣ab),
=a2+4ab+4b2﹣4b2,
=a2+4ab
(5)3(a2)3•(a3)2﹣(﹣a)2(a5)2,=3a6•a6﹣a2•a10,
=3a12﹣a12,
=2a12.
(6)(5mn﹣2m+3n)+(﹣7m﹣7mn),
=5mn﹣2m+3n﹣7m﹣7mn,
=(5﹣7)mn+(﹣2+7)m+3n,
=3n﹣9m﹣2mn;
(7)(x+2)2﹣(x+1)(x﹣1),
=x2+4x+4﹣x2+x﹣x+1,
=4x+5.
(8)(x+2)2﹣(2x)2,
=x2+4x+4﹣4x2,
=﹣3x2+4x+4;
(9)(2a+3b)2﹣4a(a+3b+1),
=4a2+12ab+9b2﹣4a2﹣12ab﹣4a,
=9b2﹣4a.
(10)(﹣2xy2)2•3x2y÷(﹣x3y4),
=4x2y4•3x2y÷(﹣x3y4),
=12x4y5÷(﹣x3y4),
=﹣12xy
(11)(x+1)2+2(1﹣x),
=(x+1)2+2(1﹣x),
=x2+2x+1+2﹣2x,
=x2+3.
(12)(﹣a3)2•(﹣a2)3,
=a6•(﹣a6),
=﹣a12;
(13)[(﹣a)(﹣b)2•a2b3c]2,
=(﹣a3b5c)2,
=a6b10c2;(14),
=(9××)3,
=23,
=8;
(15)(x3)2÷x2÷x+x3÷(﹣x)2•(﹣x2),
=x6÷x2÷x+x3÷x2•(﹣x2),
=x3﹣x3,
=0.
(16)原式=﹣27x6•(16y6)÷(216x6y3)=﹣2y3;(17)原式=(﹣x﹣y)2﹣(2y﹣x)(x+2y),
=x2+2xy+y2﹣(4y2﹣x2),
=x2+2xy+y2﹣4y2+x2,
=2xy﹣3y2
(18)
=[3x2y ÷(﹣xy)]+[﹣xy2÷(﹣xy)]+[xy ÷(﹣xy)],
=﹣6x+2y﹣1;
(19)(a+b)(﹣b+a)+(a+b)2﹣2a(a+b),
=(a+b)(a﹣b+a+b﹣2a),
=0
(20)原式=[2x(3x6y6)•y2]÷9x7y8,
=(6x7y6•y2)÷9x7y8,
=2x7y8÷9x7y8,
=;
(21)原式=x2+x﹣(4x2﹣6x+2x﹣3),
=x2+x﹣4x2+6x﹣2x+3,
=﹣3x2+5x+3;
(22)原式=(2a+3b+2a﹣3b)(2a+3b﹣2a+3b),
=4a•9b,
=36ab
(23)2a2﹣a8÷a6,
=2a2﹣a2,
=a2;
(24)(2﹣x)(2+x)+(x+4)(x﹣1),
=4﹣x2+x2+3x﹣4,