两三位数乘一位数的笔算 (不进位),考考你,608=,385,( )7=4200,2( )=800,790=,1127,480,200,600,400,630,700,123=,123=,1,3,2,6,3,36(千克),答:一共有36只。,23=6,103=30,用竖式计算:,验算:,3123=,3,6,3,9,936,123=,1,3,6,2,3,36(千克),答:一共有26只。,两、三位数乘一位数的笔算(不进位),342=,3,2,8,4,6,68,1432=,2,6,8,2,286,2133=,3,9,3,6,639,1,4,8,2,4,48,2,6,8,4,486,4,8,4,4,448,4,2,4,2,8,84,124=,422=,2432=,1124=,2、用竖式计算,3,1 3,3,9,谁是聪明的孩子?,2,1 3 4,2,6,8,谁是聪明的孩子?,124=,1,4,2,8,4,48(瓶),答:一共有48瓶。,这节课你学到了 什么知识?,