二年级数学下册第6章余数的除法3除法试商课件新人教版.ppt

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一、回顾复习,引入新知,手势游戏:( )里最大能填几?2( )13 ( )5497 ( )48 9 ( )29( )641 8( )52 4 ( )25 ( )317,6,9,6,3,6,6,6,6,二、师生互动,探究新知,算式的商是几?你是怎么想的?,4,6,4,2,1,6,1,检验:余数是否比除数小。,1.(1)26里面最多有( )个3。(2)27里面最多有( )个5。,2.直接写出下面各题的商,试试看。,讨论一下怎样能很快想出商来。,8,8,5,5,5,9,5,6,8,9,4,6,4,5,7,8,467= 76+4=,285= 55+3=,748= 89+2=,3.计算后,仔细观察上下两题,你发现了什么?,我发现:除数商+余数=被除数,64,53,92,46,28,74,4.在 里填上适当的数。,=61,你能想出多少种不同的填法?,只要除数比余数大,就符合要求。,1.本节课中,你有什么收获? 2.试商时,你有什么好的方法? 3.列好竖式,你是怎样检验的?,课本第63页“做一做”,第1题、第2题。,xx小学 x年级x班,xxx,

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