11-20各数的认识_ppt执教课件

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,*,1120各数的认识,1,1,0,2,1,0,3,10个一,1个十,是,4,12,5,12,6,12,7,15,8,14,9,17 ?,10,16 ?,11,16,12,11,13,13,14,1,9,15,1,9,16,2个十,20,是,17,14,先圈10，再写数,18,17,19,( )颗,20,( )颗,14,21,（ ）颗,22,（ ）颗,16,23,（ ）个,24,（ ）个,18,25,26,0,27,0,28,0,1,29,0,1,2,30,0,1,2,3,31,0,1,2,3,4,32,0,1,2,3,4,5,33,0,1,2,3,4,5,6,34,0,1,2,3,4,5,6,7,35,0,1,2,3,4,5,6,7,8,36,0,1,2,3,4,5,6,7,8,9,37,0,1,2,3,4,5,6,7,8,9,10,38,0,1,2,3,4,5,6,7,8,9,10,11,39,0,1,2,3,4,5,6,7,8,9,10,11,12,40,0,1,2,3,4,5,6,7,8,9,10,11,12,13,41,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,42,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,43,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,44,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,45,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,46,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,47,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,48,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,49,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,50,(2) 个十和 个一组成17。,(4)13前面一个数是 ,后面一个数是 。,1,12,猜一猜,(1)15里面有 个十和 个一。,1,5,7,(3) 两个十是 。,20,14,51,1个十,52,1个十,6个一,？,16,53,2个十,20,54,再见,55,