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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各数的认识,11-20各数的认识,0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20,读直尺上的数。,0 1 2 3 4 5 6 7,(),(),(),(),(),(,20,),10,13,14,18,19,12,15,16,11,17,做一做:,()()()()()(20)101,怎样数就能一眼看出?,怎样数就能一眼看出?,1120各数的认识教学课件2,1120各数的认识教学课件2,1120各数的认识教学课件2,1个十,2个一,1个十2个一,1个十,2个一,1个十2个一,11,说说数的组成:,13,15,11说说数的组成:1315,19,20,(2个十就是20),1920(2个十就是20),你说摆法,我猜数。,你说摆法,我猜数。,1120各数的认识教学课件2,1120各数的认识教学课件2,你能找到它们吗?,你能找到它们吗?,19,11,18,12,13,17,14,16,20,15,19111812131714162015,11,12,13,14,15,16,17,18,19,20,11121314151617181920,20,19,18,17,16,15,14,13,12,11,20191817161514131211,1120各数的认识教学课件2,
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