单击此处编辑母版标题样式,*,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,一、直接说出得数。,96=,811=,123=,513=,54,88,36,65,一、直接说出得数。,242=,173=,404=,561=,48,51,160,305,说出,下面算式中各部分名称。,40 4 =160,乘数,乘数,积,=5,=50,=500,=6,=60,=600,=48,=480,=4800,你发现了什么,?,试,练:,15030=,15040=,4500,6000,为什么,15040=6000,的乘数一共有,2,个,0,,可乘积,6000,中却有,3,个,0,?是不是算错了?,24,240,480,720,=1600,=1200,=2400,=1000,=720,=260,=750,=560,123=36,(),30=360,(),30=3600,根据每组中的第一个算式填空。,12,120,513=65,5,(),=650,5 0,(),=6500,130,130,152=30,(),20=300,150,(),=3000,15,20,40,(),65,30,(),165,5 0,(),210,1,5,4,80,(),550,20,(),87,7 0,(),200,6,4,2,