11-20各数的认识_ppt执教课件_(谢)

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,*,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,*,九年义务教育人教版小学数学第一册第七单元,1120,各数的认识,1,2,先数出十根小棒，捆成一捆。,10,个一,1,个十,3,1,个十和,2,个一合起来是,12,。,1 2,写作：,读作：十二,4,1,个十和,5,个一合起来是,15,。,1 5,写作：,读作：十五,5,6,7,返回,8,10,个一,1,个十,是,9,11,10,12,11,12,12,13,13,14,14,12,15,15,16,16 ?,17,16,18,17 ?,19,18,20,21,22,2,个十,20,是,23,24,0,25,0,26,0,1,27,0,1,2,28,0,1,2,3,29,0,1,2,3,4,30,0,1,2,3,4,5,31,0,1,2,3,4,5,6,32,0,1,2,3,4,5,6,7,33,0,1,2,3,4,5,6,7,8,34,0,1,2,3,4,5,6,7,8,9,35,0,1,2,3,4,5,6,7,8,9,10,36,0,1,2,3,4,5,6,7,8,9,10,11,37,0,1,2,3,4,5,6,7,8,9,10,11,12,38,0,1,2,3,4,5,6,7,8,9,10,11,12,13,39,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,40,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,41,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,42,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,43,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,44,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,45,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,46,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,47,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,48,14,49,17,50,从,7,数到,17,51,从,11,数到,20,52,53,54,17,55,56,15,和,17,57,一个一个数,58,两个两个数,59,五个五个数,60,1,个十,61,1,个十,6,个一,？,16,62,2,个十,20,63,抢答题,:,（,1,）,15,是由,( ),个十和,( ),个一组成,（,2,）,( ),个十和,( ),个一组成,17,（,3,）,16,前面一个数是,( ),后面一个数是,( ),（,4,）与,19,相邻的两个数是,( ),和,( ),1,1,15,18,5,7,17,20,64,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,（,3,）,15,是由,( ),个十和,( ),个一组成。,我会答,:,（,4,）,( ),个一和,( ),个十和起来,13,。,（,2,）,16,前面一个数是,( ),后面一个数是,( ),。,（,6,）与,19,相邻的两个数是,( ),和,( ),。,（,5,）,16,和,18,中间的一个数是（ ）。,（,1,）比,10,多,1,的是（ ），比,17,少,1,的是（ ）。,11,16,15,17,1,5,1,3,17,18,20,65,19,11,18,12,13,17,14,16,20,15,66,11,12,13,14,15,16,17,18,19,20,11,12,13,14,15,16,17,18,19,20,67,20,19,18,17,16,15,14,13,12,11,68,再见,69,