265x105265x5怎样脱式计算265x105-265x5=265x(105-5)=265x100=2650265x105-265x5=265x(105-5)=265x100=265002,X252X252用两种解法(1)平方差(X+5/2)2-(X-5/2)2=(x+5/2+x-5/2)(x+5/2-x+5/2)=2x×5=10x;(2)直接计算(X+5/2)2-(X-5/2)2=x2+25/4+5x-x2-25/4+5x=10x;<(x-2/3x)-(x+2/x)>x/x^2-4=
265x105265x5怎样脱式计算265x105-265x5=265x(105-5)=265x100=2650265x105-265x5=265x(105-5)=265x100=265002,X252X252用两种解法(1)平方差(X+5/2)2-(X-5/2)2=(x+5/2+x-5/2)(x+5/2-x+5/2)=2x×5=10x;(2)直接计算(X+5/2)2-(X-5/2)2=x2+25/4+5x-x2-25/4+5x=10x;<(x-2/3x)-(x+2/x)>x/x^2-4=
265x105265x5怎样脱式计算265x105-265x5=265x(105-5)=265x100=2650265x105-265x5=265x(105-5)=265x100=265002,X252X252用两种解法(1)平方差(X+5/2)2-(X-5/2)2=(x+5/2+x-5/2)(x+5/2-x+5/2)=2x×5=10x;(2)直接计算(X+5/2)2-(X-5/2)2=x2+25/4+5x-x2-25/4+5x=10x;<(x-2/3x)-(x+2/x)>x/x^2-4=
265x105265x5怎样脱式计算265x105-265x5=265x(105-5)=265x100=2650265x105-265x5=265x(105-5)=265x100=265002,X252X252用两种解法(1)平方差(X+5/2)2-(X-5/2)2=(x+5/2+x-5/2)(x+5/2-x+5/2)=2x×5=10x;(2)直接计算(X+5/2)2-(X-5/2)2=x2+25/4+5x-x2-25/4+5x=10x;<(x-2/3x)-(x+2/x)>x/x^2-4=
265x105265x5怎样脱式计算265x105-265x5=265x(105-5)=265x100=2650265x105-265x5=265x(105-5)=265x100=265002,X252X252用两种解法(1)平方差(X+5/2)2-(X-5/2)2=(x+5/2+x-5/2)(x+5/2-x+5/2)=2x×5=10x;(2)直接计算(X+5/2)2-(X-5/2)2=x2+25/4+5x-x2-25/4+5x=10x;<(x-2/3x)-(x+2/x)>x/x^2-4=
265x105265x5怎样脱式计算265x105-265x5=265x(105-5)=265x100=2650265x105-265x5=265x(105-5)=265x100=265002,X252X252用两种解法(1)平方差(X+5/2)2-(X-5/2)2=(x+5/2+x-5/2)(x+5/2-x+5/2)=2x×5=10x;(2)直接计算(X+5/2)2-(X-5/2)2=x2+25/4+5x-x2-25/4+5x=10x;<(x-2/3x)-(x+2/x)>x/x^2-4=
265x105265x5怎样脱式计算265x105-265x5=265x(105-5)=265x100=2650265x105-265x5=265x(105-5)=265x100=265002,X252X252用两种解法(1)平方差(X+5/2)2-(X-5/2)2=(x+5/2+x-5/2)(x+5/2-x+5/2)=2x×5=10x;(2)直接计算(X+5/2)2-(X-5/2)2=x2+25/4+5x-x2-25/4+5x=10x;<(x-2/3x)-(x+2/x)>x/x^2-4=
265x105265x5怎样脱式计算265x105-265x5=265x(105-5)=265x100=2650265x105-265x5=265x(105-5)=265x100=265002,X252X252用两种解法(1)平方差(X+5/2)2-(X-5/2)2=(x+5/2+x-5/2)(x+5/2-x+5/2)=2x×5=10x;(2)直接计算(X+5/2)2-(X-5/2)2=x2+25/4+5x-x2-25/4+5x=10x;<(x-2/3x)-(x+2/x)>x/x^2-4=
265x105265x5怎样脱式计算265x105-265x5=265x(105-5)=265x100=2650265x105-265x5=265x(105-5)=265x100=265002,X252X252用两种解法(1)平方差(X+5/2)2-(X-5/2)2=(x+5/2+x-5/2)(x+5/2-x+5/2)=2x×5=10x;(2)直接计算(X+5/2)2-(X-5/2)2=x2+25/4+5x-x2-25/4+5x=10x;<(x-2/3x)-(x+2/x)>x/x^2-4=
265x105265x5怎样脱式计算265x105-265x5=265x(105-5)=265x100=2650265x105-265x5=265x(105-5)=265x100=265002,X252X252用两种解法(1)平方差(X+5/2)2-(X-5/2)2=(x+5/2+x-5/2)(x+5/2-x+5/2)=2x×5=10x;(2)直接计算(X+5/2)2-(X-5/2)2=x2+25/4+5x-x2-25/4+5x=10x;<(x-2/3x)-(x+2/x)>x/x^2-4=