七年级多项式题20道_七年级多项式题20道单项式
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
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)
声明:本站所有文章资源内容,如无特殊说明或标注,均为采集网络资源。如若本站内容侵犯了原著者的合法权益,可联系 836084111@qq.com 删除。