有理數題目初一m=1-2.5-0.2=-1.81000m=-1.8x1000=-1800{0}2，初一數學題有理數7:4:0:12:4:31:1:2{1}3，初一有理數計算題1+(1/1+2)+(1/1+2+3)+(1/1+2+3+4)+``````（1/1+2+3+4+``````+100）=1+1/[(1+2)*2/2]+1/[(1+3)*3/2]+1/[(1+4)*4/2]+...+1/[(1+100)*100/2]=1+2/(2*3)+2/(3*4)+2/(4*5)+...+2/(100*10...