急求一道小学四年级数学题的简单算法!
瑶*** 2010-06-27 19:32:34 举报
153X98+23X98X2+49X2 =153×98+(23×2)×98+98 =153×98+46×98+98 =153×98+46×98+1×98 =98×(153+46+1) =98×200 =19600
153×98+23×98×2+49×2 =153×98+23×2×98+98×1 =(153+46+1)×98 =200×98 =19600