初一代数式计算题155道
初一代数式计算题155道
5〔a+2b〕+2〔a+2b〕
(2x^2+ax-y+b)-(2bx^2-3x+5y-1)
2(a-b)-3(a+b); 2(x+y)-3(x-2y)
m-3(4-2m)
-3(2s-5)+6
(-a-b)(b-a)
(-a-b)(a+b)
(a+b+c)(a+b-c)
3a(a+1)-b(2a-b)
x+2x-2-3x-6
5x+2-3xy+5y
(-3/4)x(8-4/3-0.04)+(-1)的2005次方
=(-3//4)x8-(3/4)x(4/3)-(-3/4)x0.04-1
=-6-1+0.03-1
=-7.97.
(-1)的6次方-1的6次方x(1/2-1/3)÷1/3-|-2|
=1-1x(1/6)x3-2
=1-1/2-2
=-1.5.
1/2+1/6+1/12+1/20+…1/90
=1/2+1/2-1/3+1/3-1/4+1/4-1/5+……+1/9-1/10
=1/2+1/2-1/10
=9/10.
3X²+4X-2X²-X+X²-3X-1
-a+b²+2ab+2a²-四分之三b²-ab
(2x²+ax-5y+b)-(2bx²-3x+5y-1)
x(x²-x)+x²(5-x)-9
x²(x²-x+1)-x(x³-x²+x-1)
8m²-5m(-m+3n)+4m(-4m-5/2n)
(-1/3xy)²[xy(2x-y)-2x(xy-y²)]
2a—5b+6+7+4b+4a
x(x+2)(x-5)-x(x-3)(x-2)
(a+2)(a-2)(a²+4)
(x+y)(x-y)-(x-y)²
2-〔2(x+3y)-3 ( x+2y)〕
(3a+2b)²-b²
(3x+9)(6x+8)
(a-b+2)(a-b-2)
(3mn+1) (3mn-1)-8m²n²
(2x²)³-6x³(x³+2x²+x)
5(X²+2)-(3X²+4)-2X²
2X²—5XY+6Y²-(7Y²+4XY+4X²)
(X+2)(X+3)
(X-2)(X-3)
(X+2)(X-3)
(X-2)(X+3)
x(x²-x)+x²(5-x)-9
x²(x²-x+1)-x(x³-x²+x-1)
8m²-5m(-m+3n)+4m(-4m-5/2n)
(-1/3xy)²[xy(2x-y)-2x(xy-y²)]
(2x²+ax-5y+b)-(2bx²-3x+5y-1)
-7x²+10x+12+2×(4x²-5x-6)
-8a²b+6a²b-3a²b
-4a²b+5ab-4-(-3a²b+4ab-1)
(2x³-3x²y-2xy²)-(x³-2xy²+y³)+(-x³+3x²y-y³)
(6xy+7y)+[8x-(5xy-y+6x)]
暂时先打这些,明天我再帮你补充完!