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20以内的进位加法在日常的生活中有着广泛的运用,是多位数计算的基础。9加几的进位加法是第一课,是学生已经学习了10以内的加减法,11~20各数的认识的基础上进行的。记得三年前我任教一年级,所选的研讨课就是“9加几”。选题考虑有三:1.这部分的内容很重要,是20以内加法的开篇;2.这部分的内容是在学期的后段,这时的一年级学生已形成了一定的教学常规,知道了一些学习的方法,课堂的展示比较全面,能尽可能地
The carry addition within 20 has a wide range of uses in everyday life and is the basis for multi-digit calculations. 9 plus a few carry addition is the first lesson is that students have learned the addition and subtraction within 10, 11 to 20 on the basis of knowledge. I remember three years ago I taught first grade, the selected seminar is “9 plus a few ”. Topics to consider three: 1. This part of the content is very important, is the beginning of the addition of 20; 2. The content of this part is in the latter part of the semester, when the first-year students have formed a certain teaching practices, know Some learning methods, classroom presentation more comprehensive, as much as possible