商是几位数,小梦和小欣整理照片,2386=,394,3,5,4,18,8,9,54,自测练习：,1判断下面各题的商是几位数？,(1)2575的商是( )位数,(4)3172的商是( )位数,(2)8046的商是( )位数,(3)1834的商是( )位数,两,三,两,三,2计算下面各题：,4,24,3,36,0,6,6,6,2,12,4,2,1,6,5,2,7,1,1,2,4,0,2,3,1,21,0,1,6,4,0,3,2,3,1,9,1,6,48,1,2,2,8,16,8,72,1,0,2,18,8,1007 =,1,3,7,4,0,28,2,142,验算,14,7,8,2,9,2,100,计算下面各题，并且验算,538,8567,6,5,48,验算,6,8,48,5,53,2,5,7,2,14,6,1,1,1,14,2,验算,122,7,2,.,856,65,1222,4,5,8,825,2836,498,66,71,24,117,181,910,比一比,四、能力拓展：,参观科技馆的成人人数是儿童的2倍。如果一共有456人参观，儿童有多少人？,?人,456人,儿童,成人,1倍,2倍,参观科技馆的成人人数是儿童的2倍。如果一共有456人参观，儿童有多少人？,456（12）,4563,152(人),答：儿童有152人。,
