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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,*,11-20的个数的认识,民族小学:邹岚,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,19,16,18,20,17,10,13,11,12,14,15,16,18,19,17,15,14,10,13,14,18,19,11,12,15,16,17,20,先数出十根小棒,捆成一捆。接着怎么数,?,一个十,()个一,10,十一,十二,十三,十四,十五,十六,十七,十八,十九,二十,一个十,一个十,2,个十,(,20,),1,个十和,2,个一合起来是,12,。,1 2,写作:,读作:,十二,1,个十和,5,个一合起来是,15,。,1 5,写作,:,读作:,十五,1,个十和,1,个一,合起来是十一。,11,十一,15,十五,20,二十,11,说说数的组成:,13,15,19,20,(,2,个十就是,20,),0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20,1、13的前面一个数是(),后面一个数是()。,2、与15相邻的两个数是()(),14比12大(),3、16后面三个数是()、()、()。,4、比10大比15小的数有()个,分别是,()。,读直尺上的数,12,14,14,16,2,17,18,19,11、,12,、,13,、,14,4,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,(5),15,是由,(),个十和,(),个一组成。,(6),(),个一和,(),个十和起来,13,。,(4),16,前面一个数是,(),后面一个数是,(),。,(8)与,19,相邻的两个数是,(),和,(),。,(7),16,和,18,中间的一个数是()。,(3)比,10,多,1,的是(),比,17,少,1,的是()。,11,16,15,17,1,5,1,3,17,18,20,(,1,)单数有:()。,(2)双数有:()。,1,3,5,7,9,11,15,13,17,19,2,4,6,8,10,12,14,16,18,20,1.,从一数到二十。从七数到十三。,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,7,8,9,10,11,12,13,2.,读一读。,二十,十三,十五,十八,十一,11,13,16,20,18,15,12,19,按顺序填数。,12,14,15,17,18,19,17,16,14,13,再见!,
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