1/18=1/( )+1/( ) 1/24=1/( )+1/( ) 1/16=1/( )+1/( )

1/?+1/18=1/? 1+1/2+18/6/3=? 1/2+1/6+1/18+1/54+1/162+1/486=? 数学改错题 （ 1/18+1/16）*18*16=1/18*18+1/16*16=2 1/2 1/4 1/8 1/16=18,加运算符号18改成8 1/18=1/( )+1/( ) 1/24=1/( )+1/( ) 1/16=1/( )+1/( ) 1/1*2+1/2*3+.1/18*19+1/19*20=? (x+18):2x=2:1 |1/20-1/19|+|1/19-1/18|+|1/18-1/17|+.+|1/2-1| 1/4-1/5=1/18+1/6=1/2-1/8=7/11+5=1/3+1/4=2-1/3= 2/3+1/6+1/9+1/12+1/15+1/18= 1/1*3+1/2*4+1/3*5+…1/18*20=? 1/1*3+1/2*4+1/3*5+.1/18*20=? 1/1X3+1/2X4+1/3X5+.+1/18X20=? 1/1x3+1/2x4+1/3x5.1/18x20=?简便算法, 1/1x3+1/2x4+1/3x5+……+1/18x20=? 1X3/1+2X4/1+3X5/1+.+18X20/1=? 1+1=1,2+1=1,3+4=1,4+9=1,5+7=1,6+18=1 脑筋脑筋急转弯