5/3x6/1x5= (10/1+4/1)x4= (9/8+27/4)x27= 39x38/27= 2/1x15/4+3

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/17 08:11:21

5/3x6/1x5= (10/1+4/1)x4= (9/8+27/4)x27= 39x38/27= 2/1x15/4+3/1x2/1= 7/5x16x5/21= 12x(2/1-3/1+4/1)=
7/12x(6/7+3/14)= 5/1+9/4x8/3+6/5= (5/1-7/1)x70= 97x96/5= 15x7/3+15x7/4= (9/8+4/3-3/2)x72= 5/3x8+5/3x2= 72x(2/1-3/1+4/1)= （这些要简便运算的,上面的也一样） 4x15/2= 12/5x8= 3/1x4/1= 9/8x10/3= 9/2x5/3= 14/6x9/7= 8/5x15/4= 20/9x21/5= 25/7x21/15=

太乱了

(2X2)/1X3+(4X4)/(3X5)+(6X6)/(5X7)+...+(20X20)/(19X21)==? 1x1-2x2+3x3-4x4+5x5-6x6.-100x100+101x101 2x3十4x6十6x9十8x12十10x15分之1x2十2x4十3x6十4x8十5x10. 某同学做一道数学题：当x=-1时，求10x9+9x8+8x7+7x6+6x5+5x4+4x3+3x2+2x+1的值，由于小明做一道数学题，“求代数式10x9+9x8+8x7+7x6+6x5+5x4+4x3+3x2+2x+1，当x=-1时的值某同学在做一道题：求代数式10x9+9x8+8x7+7x6+6x5+5x4+4x3+3x2+2x+1当x=-1时的值．由 2x2/1x3+4x4/3x5+6x6/5x7+8x8/7x9+10x10/9x11+12x12/11x13 仔细看看 1/1X2+1/2X3+1/3X4+1/4X5+1/5X6……1/2007X2008 1x2/1+2x3/1+3x4/1+4x5/1+5x6/1+6x7/1 1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+......1/2008x2009 1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7 计算：1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9+1/9x10.