初一加减混合运算题目录
求20道初一年级加减乘除和乘方混合运算题。例如,(—9)二次方+【5+(—6)】—9除以5.急求。
1;3÷〔2+11二次方)-121
2;(4+5-8)二次方
3;11×9+1二次方
4:10二次方×12+2×7
5;16二次方-6
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x<0,y>0)等于______.
36.已知x≤y,x+y-|x-y|=______.
37.已知x<0,y<0,化简|x+y|-|5-x-y|=______.
38.4a2n-an-(3an-2a2n)=______.
39.若一个多项式加上-3x2y+2x2-3xy-4得
2x2y+3xy2-x2+2xy,
则这个多项式为______.
40.-5xm-xm-(-7xm)+(-3xm)=______.
41.当a=-1,b=-2时,
[a-(b-c)]-[-b-(-c-a)]=______.
43.当a=-1,b=1,c=-1时,
-[b-2(-5a)]-(-3b+5c)=______.
44.-2(3x+z)-(-6x)+(-5y+3z)=______.
45.-5an-an+1-(-7an+1)+(-3an)=______.
46.3a-(2a-4b-6c)+3(-2c+2b)=______.
48.9a2+[7a2-2a-(-a2+3a)]=______.
50.当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______.
.(4x2-8x+5)-(x3+3x2-6x+2).
72.(0.3x3-x2y+xy2-y3)-(-0.5x3-x2y+0.3xy2).
73.-{2a2b-[3abc-(4ab2-a2b)]}.
74.(5a2b+3a2b2-ab2)-(-2ab2+3a2b2+a2b).
75.(x2-2y2-z2)-(-y2+3x2-z2)+(5x2-y2+2z2).
76.(3a6-a4+2a5-4a3-1)-(2-a+a3-a5-a4).
77.(4a-2b-c)-5a-[8b-2c-(a+b)].
78.(2m-3n)-(3m-2n)+(5n+m).
79.(3a2-4ab-5b2)-(2b2-5a2+2ab)-(-6ab).
80.xy-(2xy-3z)+(3xy-4z).
81.(-3x3+2x2-5x+1)-(5-6x-x2+x3).
83.3x-(2x-4y-6x)+3(-2z+2y).
84.(-x2+4+3x4-x3)-(x2+2x-x4-5).
85.若A=5a2-2ab+3b2,B=-2b2+3ab-a2,计算A+B.
86.已知A=3a2-5a-12,B=2a2+3a-4,求2(A-B).
87.2m-{-3n+[-4m-(3m-n)]}.
88.5m2n+(-2m2n)+2mn2-(+m2n).
89.4(x-y+z)-2(x+y-z)-3(-x-y-z).
90.2(x2-2xy+y2-3)+(-x2+y2)-(x2+2xy+y2).
92.2(a2-ab-b2)-3(4a-2b)+2(7a2-4ab+b2).
93.2x2-{-3x-[4x2-(3x2-x)+(x-x2)]}.
94:-(7x-y-2z)-{[4x-(x-y-z)-3x+z]-x}.
95:(+3a)+(-5a)+(-7a)+(-31a)-(+4a)-(-8a).
96:a3-(a2-a)+(a2-a+1)-(1-a4+a3).
97.4x-2(x-3)-3[x-3(4-2x)+8].
展开全部
0-1+2-3+4-5=2+4-1-3-5=6-9=-3
-4.2+5.7-8.4+10.2=10.2+5.7-(4.2+8.4)=15.9-12.6=3.3
-30-11-(-10)+(-12)+18=-30-11+10-12+18=10+18-(30+11+12)=28-53=-25
三又二分之一-(二又四分之一)+(-三分之一)-四分之-(+六分之一)
=3+1/2-2-1/4-1/3-1/4-1/6
=1+(1/2-1/4-1/4)-(1/3+1/6)
=1-1/2=1/2
(-7)-(-10)+(-8)-(+2)=-7+10-8-2=-7
1+(-1又二分之一)-(-二分之一)-(+四分之一)
=1-1-1/2+1/2-1/4
=-1/4
(+二分之一)+[(-2)+(+二分之一)]
=1/2-2+1/2
=-1
(-1.2)+[1-(-0.3)]=-1.2+1+0.3=0.1
13-[26-(-21)+(-18)]
=13-26+(-21)-(-18)
=13-26-21+18
=31-47=-16
[1.4-(-3.6+5.2)-4.3]-(-1.5)
=1.4+3.6-5.2-4.3+1.5
=6.5-9.5
=-3
|-二又四分之一|-(-四分之三)+1 - | 1 ﹣二分之一|
=2+1/4+3/4+1-1/2
=4-1/2
=3又1/2
初一加减混合运算题目录
求20道初一年级加减乘除和乘方混合运算题。例如,(—9)二次方+【5+(—6)】—9除以5.急求。
1;3÷〔2+11二次方)-121
2;(4+5-8)二次方
3;11×9+1二次方
4:10二次方×12+2×7
5;16二次方-6
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x<0,y>0)等于______.
36.已知x≤y,x+y-|x-y|=______.
37.已知x<0,y<0,化简|x+y|-|5-x-y|=______.
38.4a2n-an-(3an-2a2n)=______.
39.若一个多项式加上-3x2y+2x2-3xy-4得
2x2y+3xy2-x2+2xy,
则这个多项式为______.
40.-5xm-xm-(-7xm)+(-3xm)=______.
41.当a=-1,b=-2时,
[a-(b-c)]-[-b-(-c-a)]=______.
43.当a=-1,b=1,c=-1时,
-[b-2(-5a)]-(-3b+5c)=______.
44.-2(3x+z)-(-6x)+(-5y+3z)=______.
45.-5an-an+1-(-7an+1)+(-3an)=______.
46.3a-(2a-4b-6c)+3(-2c+2b)=______.
48.9a2+[7a2-2a-(-a2+3a)]=______.
50.当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______.
.(4x2-8x+5)-(x3+3x2-6x+2).
72.(0.3x3-x2y+xy2-y3)-(-0.5x3-x2y+0.3xy2).
73.-{2a2b-[3abc-(4ab2-a2b)]}.
74.(5a2b+3a2b2-ab2)-(-2ab2+3a2b2+a2b).
75.(x2-2y2-z2)-(-y2+3x2-z2)+(5x2-y2+2z2).
76.(3a6-a4+2a5-4a3-1)-(2-a+a3-a5-a4).
77.(4a-2b-c)-5a-[8b-2c-(a+b)].
78.(2m-3n)-(3m-2n)+(5n+m).
79.(3a2-4ab-5b2)-(2b2-5a2+2ab)-(-6ab).
80.xy-(2xy-3z)+(3xy-4z).
81.(-3x3+2x2-5x+1)-(5-6x-x2+x3).
83.3x-(2x-4y-6x)+3(-2z+2y).
84.(-x2+4+3x4-x3)-(x2+2x-x4-5).
85.若A=5a2-2ab+3b2,B=-2b2+3ab-a2,计算A+B.
86.已知A=3a2-5a-12,B=2a2+3a-4,求2(A-B).
87.2m-{-3n+[-4m-(3m-n)]}.
88.5m2n+(-2m2n)+2mn2-(+m2n).
89.4(x-y+z)-2(x+y-z)-3(-x-y-z).
90.2(x2-2xy+y2-3)+(-x2+y2)-(x2+2xy+y2).
92.2(a2-ab-b2)-3(4a-2b)+2(7a2-4ab+b2).
93.2x2-{-3x-[4x2-(3x2-x)+(x-x2)]}.
94:-(7x-y-2z)-{[4x-(x-y-z)-3x+z]-x}.
95:(+3a)+(-5a)+(-7a)+(-31a)-(+4a)-(-8a).
96:a3-(a2-a)+(a2-a+1)-(1-a4+a3).
97.4x-2(x-3)-3[x-3(4-2x)+8].
展开全部
0-1+2-3+4-5=2+4-1-3-5=6-9=-3
-4.2+5.7-8.4+10.2=10.2+5.7-(4.2+8.4)=15.9-12.6=3.3
-30-11-(-10)+(-12)+18=-30-11+10-12+18=10+18-(30+11+12)=28-53=-25
三又二分之一-(二又四分之一)+(-三分之一)-四分之-(+六分之一)
=3+1/2-2-1/4-1/3-1/4-1/6
=1+(1/2-1/4-1/4)-(1/3+1/6)
=1-1/2=1/2
(-7)-(-10)+(-8)-(+2)=-7+10-8-2=-7
1+(-1又二分之一)-(-二分之一)-(+四分之一)
=1-1-1/2+1/2-1/4
=-1/4
(+二分之一)+[(-2)+(+二分之一)]
=1/2-2+1/2
=-1
(-1.2)+[1-(-0.3)]=-1.2+1+0.3=0.1
13-[26-(-21)+(-18)]
=13-26+(-21)-(-18)
=13-26-21+18
=31-47=-16
[1.4-(-3.6+5.2)-4.3]-(-1.5)
=1.4+3.6-5.2-4.3+1.5
=6.5-9.5
=-3
|-二又四分之一|-(-四分之三)+1 - | 1 ﹣二分之一|
=2+1/4+3/4+1-1/2
=4-1/2
=3又1/2