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11~20各数的认识是小学数学教学内容。为了达成教学目标,可以展开如下教学。一、体会学习大数的必要性出示古人用石子数羊的情境图。学生用小棒代替小羊,摆一摆,数一数。学生会发现小羊的只数比10多1。教师点拨:用以前学习的数不能表示这个数的大小,这个比10多1的数是多少呢?我们共同来认识,从而让学生体会学习大数的必要性。二、认、读、写10和11(1)认识十。我们可以把10根小棒捆成一捆,一捆是10根小棒,10个一,是一个十。一捆就是一个十。(2)认读10。首先认
11 ~ 20 The understanding of the number of elementary mathematics teaching content. In order to achieve the teaching goal, you can expand the following teaching. First, the need to understand the large number of learning to show the ancients with stone number sheep situation map. Students use small stick instead of lamb, put a few, count. Students will find that the number of lambs is more than 10. Teacher’s Guide: The number of previous studies can not indicate the size of this number. What is the number of more than 10? We know it together so that students will understand the necessity of learning a large number. Second, recognize, read, write 10 and 11 (1) recognize ten. We can put 10 small sticks into a bundle, a bundle of 10 small sticks, 10 one, is a ten. A bundle is a ten. (2) Read 10. First identify