3,4,5,(2)1,2,3.
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3,4,5,(2)1,2,3.
(2/1+3/1+4/1+...+60/1)+(3/2+4/2.+60/2)+(4/3+5/3...+60/3)+(59/58+60/58)+60/59=?
观察规律填空1) 1.-1/2.1/3.-1/4.1/5.-1/62) -X 2X^2 -3X^3 4X^4 -5X^5
1.3(2x+7)>23 2.12-4(3x-1≤2(2x-16) 3.x+3/5<2x-5/3 -1
1/3x²‐[4x‐(1/2x‐5)+1/2x²]+3.
计算:1.(-2xy^2)^2÷(1/3xy) 2.(8a^3b^4-5a^2b^2)÷(2ab)^2 3.(a-1)^2-(3a+1)(a-1)
填空1.(3x-1)(4x+5)2.(-4x-y)(-5x+2y)3.(x+3)(x+4)-(X-1)(X-2)4.(y-1)(y-2)
1+(1+2)+(1+2+3)+(1+2+3+4).+(1+2+3.+50)
简便计算(1.) 7/18-1/2÷3/4-1/3 (2.)1/6+3/4×2/3÷2 (3.)4/25÷【(2/5+1/3)×9/11】急
分数乘除法 1.7/10-2/7÷5/7 2.5/8*1/4+1/4*3/8 3.(1/2-1/3)÷5/6+1/3 4.4/5*(5/6-3/4)-1/15
1.—3/5+丨3/4+(—4)丨+(—2/5) 2.—1/2+4/5+(_2/3)+1/2+(_1/3) 3.(_0.5)+3.75+2.25+(_5.5) 答者重赏.
1、(3x+2)(3x-2)-5x(x-1)-(2x-1)^2 ,其中x=-1/3 先化简,在求值 2、999^2-1000*998 3.比较大小:(1) 4^2+3^2____2*3*4 (-2)^2+1^2____2*(-2)*1 6^2+7^2______2*6*7 3^2+3^2_____2*3*3 (2/3)^2 +(-1)^2_____2*2/3*(-1) (2/3)^2+(2/3)^2_____2*2/3*2/3
①.1+(-2)+3+(-4)+5+(-6)+...+(99)+(-100)写出过程!②.(-7分之3)+(+5分之1)+(+7分之2)+(-1又5分之③.(-2.125)+(3又5分之1)+(5又8分之1)+(-3.④.(2又5分之3)+(3又4分之1)+(-3又5分之2)+(+2
简便计算,1.12×(-3/5)+(-13)×3/52.4×(-5)-4×(7-5/4)+8/17×(-41/4)(-四又四分之一)3.(-24)×(1/2-1/3)×(-1/4)
1.-5(1-5分之1x) 2.-3(m的2次方-2n) 3.x-4(2分之1x-y) 快的!
分式计算1.(6/a^2-9)-(1/a-3)2.a+5-(5/5-a)3.x^2-4/x^2-4x+3*x-1/x^2+3x+2
4×(-1/2²)-3/2×(-2/5)
1.-5-(-4)+(-3)-22.-2的4次方+/3-4/×(-3)的二次方-2*(-1)的九十九次方3.(-4又1/2)÷41/2×123×(-2/9)4.[3又1/3÷(-2/3)×1/5]的四次方-2×(-3)-(-5)的二次方