求几道初一数学的多项式乘多项式的难题。。。急。。。。不要。

1).(-a)^2·(-a)^3=, (-x)·x^2·(-x^4)=, (xy^2)^2=

七年级多项式题20道_七年级多项式题20道单项式七年级多项式题20道_七年级多项式题20道单项式


七年级多项式题20道_七年级多项式题20道单项式


2) .(-210^5)^210^21=, (-3xy^2)^2·(-2x^2y)=

3) .(-8)^2004(-0.125)^2003=, 2^2005-2^2004=

4) .0.000 000 0357= (用科学计数法表示)

5).x^n=5,y^n=3,则(xy)^2n= . 若2^x=m,2^y=n,则8^x+y=

6) .若A=3x-2,B=1-2x,C=-5x,则A·B+A·C=

7) .(-80.125)^0=

8) .比较25^180,64^120,81^90的大小(用“<”号连起来):

9).四个连续自然数中,两个大数的积与其余两个数的积的等于58,则这四个数的和是

10)2^199+2^198+2^197+...+2^2+2+1

二..

1).与(x^2+x+1)(x-1)的积等于x^6-1的多项式是( )

A.x^2-1 B.x^3-1 C.x^2+1 D.x^3+1

2) .已知5^x=3,5^y=4,则25^x+y的结果为( )

A.144 B.24 C.25 D.49

3).x为正整数,且满足3^x+1·2^x-3^x+1=6^6,则x=( )

A.2 B.3 C.6 D.12

好的 孩子 我教你

求20道初一上学期整式化简求值的题

1.3ab-4ab+8ab-7ab+ab=______.

2.7x-(5x-5y)-y=______.

3.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.

4.-7x2+6x+13x2-4x-5x2=______.

5.2y+(-2y+5)-(3y+2)=______.

6.(2x2-3xy+4y2)+(x2+2xy-3y2)=______.

7.2a-(3a-2b+2)+(3a-4b-1)=______.

8.-6x2-7x2+15x2-2x2=______.

9.2x-(x+3y)-(-x-y)-(x-y)=______.

10.2x+2y-[3x-2(x-y)]=______.

11.5-(1-x)-1-(x-1)=______.

12.( )+(4xy+7x2-y2)=10x2-xy.

13.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3.

14.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______.

15.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______.

16.若a=-0.2,b=0.5,代数式-(|a2b|-|ab2|)的值为______.

17.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.

18.-(2x2-y2)-[2y2-(x2+2xy)]=______.

19.若-3a3b2与5ax-1by+2是同类项,则x=______,y=______.

20.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.

求初一计算题(解方程+化简求值+有理数混合运算)60道(各30题)

解方程

1)87x+2y=7733

20x+32y=4364

:x=87 y=82

2)44x+60y=6340

15x+42y=4122

:x=20 y=

3)11x+74y=3548

71x+45y=4730

:x=40 y=42

4)53x+54y=3229

70x+43y=2877

:x=11 y=49

5)43x+9y=801

76x+16y=1420

:x=9 y=46

6)55x+32y=6161

45x+84y=10707

:x=55 y=98

7)47x+27y=5396

94x+55y=10870

:x=70 y=78

8)33x+49y=4237

92x+2y=6428

:x=69 y=40

9)0x+56y=3920

64x+90y=9244

:x=46 y=70

10)x+8y=4696

51x+66y=5154

:x=48 y=41

11)76x+90y=12152

52x+0y=4004

:x=77 y=70

12)47x+55y=6777

19x+48y=4131

:x=81 y=54

13)99x+57y=6558

85x+46y=5563

:x=53 y=23

14)26x+73y=7814

69x+65y=8379

:x=31 y=96

15)78x+35y=6814

10x+52y=2394

:x=73 y=32

16)21x+34y=3444

30x+35y=4350

:x=96 y=42

17)76x+64y=6048

54x+78y=6444

:x=24 y=66

18)25x+78y=64

72x+61y=11992

:x=92 y=88

19)57x+62y=7419

18x+71y=7125

:x=29 y=93

20)53x+16y=1665

0x+2y=122

:x=13 y=61

21)26x+88y=5346

18x+76y=4274

:x=77 y=38

22)45x+61y=3848

88x+y=6450

:x=34 y=38

23)98x+42y=11088

4x+32y=2512

:x=84 y=68

24)18x+86y=9558

60x+43y=7737

:x=58 y=99

25)11x+96y=5708

66x+13y=1031

:x=4 y=59

26)53x+12y=3567

94x+69y=3

:x=63 y=19

27)70x+16y=3508

63x+16y=3186

:x=46 y=18

28)0x+10y=940

66x+20y=4850

:x=45 y=94

29)39x+66y=77

55x+22y=5159

:x=61 y=82

30)11x+74y=4537

12x+1y=405

:x=29 y=57

化简求值

3.3ab-4ab+8ab-7ab+ab=______.

4.7x-(5x-5y)-y=______.

5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.

6.-7x2+6x+13x2-4x-5x2=______.

7.2y+(-2y+5)-(3y+2)=______.

11.(2x2-3xy+4y2)+(x2+2xy-3y2)=______.

12.2a-(3a-2b+2)+(3a-4b-1)=______.

13.-6x2-7x2+15x2-2x2=______.

14.2x-(x+3y)-(-x-y)-(x-y)=______.

16.2x+2y-[3x-2(x-y)]=______.

17.5-(1-x)-1-(x-1)=______.

18.( )+(4xy+7x2-y2)=10x2-xy.

19.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3.

21.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______.

22.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______.

23.若a=-0.2,b=0.5,代数式-(|a2b|-|ab2|)的值为______.

25.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.

26.-(2x2-y2)-[2y2-(x2+2xy)]=______.

27.若-3a3b2与5ax-1by+2是同类项,则x=______,y=______.

28.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.

29.化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______.

30.2a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( ).

31.3a-(2a-3b)+3(a-2b)-b=______.

32.化简代数式x-[y-2x-(x+y)]等于______.

33.[5a2+( )a-7]+[( )a2-4a+( )]=a2+2a+1.

34.3x-[y-(2x+y)]=______.

35.化简|1-x+y|-|x-y|(其中x0)等于______.

36.已知x≤y,x+y-|x-y|=______.

37.已知x

30个多项式乘以多项式的计算题(初一下册数学)

1(2a+b)(a-2b) 2(a+b)^2 3(x^2+xy+y^2)(x^2-xy+y^2)4(2x^4-3x^3+5x^2+x)(-x+1) 5(x+1)(x+2)(x+3) 6 (2x+3y) (3x-2y) 7(x+2)(x+3)-(x+6)(x-1) 8(3x2+2x+1)(2x2+3x-1) 9(3x+2y)(2x+3y)-(x-3y)(3x+4y)

10(3x-1)(4x+5) 11(-4x-y)(-5x+2y) 12(x+3)(x+4)-(x-1)(x-2)

13(y-1)(y-2)(y-3) 14(x-4)(x-9) 15(xy-8a)(xy+2a). 16(a2+2)(a4-2a2+4)+(a2-2)(a4+2a2+4) 17(2a-3b)(2a+3b) 18(a+b+c)×(d+e+f) 19(a+b)×(a-b) 20(a+b)×(a+b) 20道计算题,再想不到了!

主要用到分配律,列于:(x+2)(x+3)=x^2+5x+6.

1(2a+b)(a-2b) 2(a+b)^2 3(x^2+xy+y^2)(x^2-xy+y^2)4(2x^4-3x^3+5x^2+x)(-x+1) 5(x+1)(x+2)(x+3) 6 (2x+3y) (3x-2y) 7(x+2)(x+3)-(x+6)(x-1) 8(3x2+2x+1)(2x2+3x-1) 9(3x+2y)(2x+3y)-(x-3y)(3x+4y)

10(3x-1)(4x+5) 11(-4x-y)(-5x+2y)