5/4x23.3+4/5x6又7/10 简算 11.2x8.1+5/4+53.7x1.9 简算
5/4x23.3+4/5x6又7/10 简算 11.2x8.1+5/4+53.7x1.9 简算
11.2x8.1+5/4+53.7x1.9 简算
1x2+2x4+3x6+4x8+5x10+.+20x40 怎么算?
1x2+2x4+3x6+4x8+5x10+.+20x40 简便计算
2x2/1x3+4x4/3x5+6x6/5x7+8x8/7x9+10x10/9x11+12x12/11x13 仔细看看
计算:1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9+1/9x10.
1x2+2x4+3x6+4x8 ------------------------------- 2x3+4x6+6x9+
2x3十4x6十6x9十8x12十10x15分之1x2十2x4十3x6十4x8十5x10.
算数题 求解1/1X2+1/2X3+1/3X4+1/4X5+1/5X6+1/7X8要过程
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