1x8+1 =9 12x8+2=98 123x8+3=987 9x9-1=80 98x9-2=880 987x8-3=8

1x8+1 =9 12x8+2=98 123x8+3=987 9x9-1=80 98x9-2=880 987x8-3=8 1X8+1=9,12X8+2=98,123x8+3=987,1234x8+4=9876找规律把下面,□填上数字 1x8+1=9,12x8+2=98,123x8+3=987,1234x8+4=9876照样子继续 1x8+1=9 12x8+2=98 123x8+3=987 这三个算式有什么规律? 1x8+1=9 12x8+2=98 123x8+3=987 这三个算式有什么规律 (125+6)X8=( )x8+( )x8 (0.25+1/4+l/2)x8= 已知:x1=1/2+1/3,x2=1/3+1/4,x3=x2+x1,x4=x3+x2.,x10=x9+x8,求：x7/x 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 1x2+2x4+3x6+4x8 ------------------------------- 2x3+4x6+6x9+