三位数除以一位数的笔算,西南师大,三年级下册,在,里填上适当的数字。,87,3,300,12,9,20,73,4,200,17,2,300,8,8,9,6,复习导入,小猪平均每分吹多少个泡泡？,1353=_,（个）,5,3,分吹,135,个,探索新知,估一估，商大约是多少？,被除数百位上的,1,比除数,3,小，商应该是个,两位数,。,1353=_,（个）,135,1,3,4,12,1,5,15,0,5,3,1353=_,（个）,4,为什么写在十位上？,45,答：小猪平均每分吹,45,个泡泡。,算,一,算,2884=2762=6393=,72,138,213,288,7,28,8,8,0,2,4,276,1,2,7,6,1,3,2,6,8,16,0,639,2,6,3,3,1,3,9,3,9,0,说一说,商是三位数，百位上商,2,。,商是两位数，十位上商,4,。,课堂活动,1.,先说出商是几位数，再计算。,6 4 8,4,3 5 7,7,7 5 5,5,5 1 2,2,1,4,2,4,6,2,4,8,2,8,0,5,3,5,7,1,7,0,1,5,1,5,3,1,5,5,5,0,1,2,4,1,1,5,1,0,1,2,6,1,2,0,随堂练习,2.,用竖式计算。,3069,7839,2164,4282,9848,5364,4277,1866,=34,=87,=54,=214,=123,=134,=61,=31,通过这节课的学习活动，你有什么收获？,课堂小结,