人教版数学一上《11~20各数的认识》PPT课件6.ppt
11 20各数的认识,人教新课标一年级数学上册,教学目标,1.使同学们能够正确地数出数量在1120之间的物体个数,知道这些数是由一个十和几个一组成的,掌握20以内数的顺序和大小。2.培养同学们良好的学习习惯。,12,12,十个一,十个一,一个十,是,12,11,15,17?,17,13?,13,2个十,20,是,.7 .12 .11,.10 .13 .15,.16,.17,.14,.18,.9,.8,.6,.5,.4.3,.2,.1,.20,.19,.1,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20,1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20,1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20,翻书游戏,分别找出书本的第8,12,17,20页,猜一猜,1,2,?,13,17,谢谢!,