五年级数学下册2因数与倍数因数和倍数(例1)课件新人教版.ppt

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因数和倍数,因数与倍数,639,197,2121,268,2010,23,306,95,122,7,2.71,5,1,3.25,1.8,2,6,计算下面各题。,一、复习导入,揭示课题,二、探究新知,639,197,2121,268,2010,23,306,95,122,7,2.71,5,1,3.25,1.8,2,6,观察这些算式,把它们分分类。,二、探究新知,第一类,1226,21211,20102,6397,3065,第一类,1226,21211,20102,6397,3065,在整数除法中,如果商是整数而没有余数,我们就说被除数是除数和商的倍数,除数和商是被除数的因数。例如,1226,12是2和6的倍数,2和6是12的因数。,二、探究新知,二、探究新知,第一类,1226,21211,20102,6397,3065,二、探究新知,第一类,1226,21211,20102,6397,3065,二、探究新知,你发现了什么?,对,因数与倍数是相互依存的。,第一类,1226,21211,20102,6397,3065,三、知识运用,

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