1.99 X 99/100 2.46 X 43/44 3.（ 7/11- 3/8）X 88 4.48 X （ 1/12+ 1/10） 5.5/13 X 27 6.3/7- 6/简便计算、过程 11/26x53

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1.99 X 99/100 2.46 X 43/44 3.（ 7/11- 3/8）X 88 4.48 X （ 1/12+ 1/10） 5.5/13 X 27 6.3/7- 6/
简便计算、过程 11/26x53

1.99 X 99/100 =(100-1)*99/100=99-99/100=98又1/100
2.46 X 43/44 =(44+2)*43/44=43+43/22=44又21/22
3.（ 7/11- 3/8）X 88 =23/88*88=23
4.48 X （ 1/12+ 1/10）=4+48/10=8又4/5
5.5/13 X 27=5/13 X (26+1)=10+5/13=10又5/13
6.3/7- 6/
11/26*53=11/26*(52+1)=22+11/26=22又11/26

99*(100-1)/100

x(x-1)(x-2)...(x-99)(x-100) x-2x+3x-4x+5x.+99x-100x=25求解（X+X)+(X-X)+(X*X)+(X/X)=100 解方程：2x+4x+6x...+100x=1-(x+3x+5x+...+99x) 1X+2X+3X…+98X+99X+100X=50500X X等于多少? 1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)= 1x+2x+3x+4x+5x+6x+7x…+99x=100 f(x)=x(x-1)(x-2)…(x-99)(x-100),求f'(100) 解方程:x-2x+3x-4x+...+99x-100x=25 计算:1/(x+3)(x+4)+1/(x+4)(x+5).1/(x+99)(x+100) 解方程：x-2x+3x-4x+.+99x-100x=25 计算1/X(X+1)+1/(X+1)(X+2)+.+1/(X+99)(X+100) x-2x+3x-4x+...+99x-100x=25 已知x^4+x^3+x^3+x^2+x^1+1=0,求x^100+x^99+x^98+x^97+x^96的值一道数学题：1/x-1+1/(x-1)(x-2)+1/(x-2)(x-3)+.+1/(x-99)(x-100) 分式：计算1/(x-1)+1/(x-1)(x-2)+1/(x-2)(x-3)+...+1/(x-99)(x-100) 1/(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)……+1/(x+99)(x+100) 已知x=100,求x(x+1)分之1+(x+1)(x+2)分之1+(x+2)(x+3)分之1+.+(x+99)(x+100)分之1