四则运算题①[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
②5+21*8/2-6-59
③68/21-8-11*8+61
④-2/9-7/9-56
⑤4.6-(-3/4+1.6-4-3/4)
⑥1/2+3+5/6-7/12
⑦[2/3-4-1/4*(-0.4)]/1/3+2
⑧22+(-4)+(-2)+4*3
⑨-2*8-8*1/2+8/1/8
⑩(2/3+1/2)/(-1/12)*(-12)
⑾(-28)/(-6+4)+(-1)
⑿2/(-2)+0/7-(-8)*(-2)
⒀(1/4-5/6+1/3+2/3)/1/2
⒁18-6/(-3)*(-2)
⒂(5+3/8*8/30/(-2)-3
⒃(-84)/2*(-3)/(-6)
⒄1/2*(-4/15)/2/3
⒅-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)
⒆-50-28+(-24)-(-22)
⒇-19.8-(-20.3)-(+20.2)-10.8
化简求值题1.若-3a3b2与5ax-1by+2是同类项,则x=______,y=______.
2.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.
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______.
一元一次方程(1)7X=5+4X
(2)7X-(X-5)=4X-1
(3)0.2X-0.1=2X
(4)7(2x-1)-3(4x-1)=4(3x+2)-1;
(5) (5y+1)+ (1-y)= (9y+1)+ (1-3y);
(6) [ (6x+8 )-4 ]=x+2;
(7) 20%+(1-20%)(320-x)=320×40%
(8)2(x-2)+2=x+1
(9)2(x-2)-3(4x-1)=9(1-x)
(10)11x+64-2x=100-9x
(11)15-(8-5x)=7x+(4-3x)
(12)3(x-7)-2[9-4(2-x)]=22
(13)3/2[2/3(1/4x-1)-2]-x=2
(14)3X+18=52 x=34/3
(15)4Y+11=22 y=11/4
(16)3X*9=5 x=5/27
(17)8Z/6=48 z=36
(18)3X+7=59 x=52/3
(19)4Y-69=81 y=75/4
(20)8X*6=5 x=5/48
(21)7Z/9=4 y=63/7
(22)15X+8-5X=54 x=4.6
(23)5Y*5=27 y=27/40
(24)8x+2=10 x=1
(25)x*8=88 x=11
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