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20以内数的减法(个位不够减)的教学内容是苏教版一年级上册第七章第五节。本节内容是学生学习了10以内数的加减法,用凑10法计算进位加法之后安排的教学内容,课本中举出的教法:(1)动手操作,用小棒摆一摆;(2)用减法是加法的逆运算进行计算。这两种教学适合一年级学生年龄特征,有可操作性,适应不同层次的学生学习。我在本节教学中总结出另一种算法——转换法,利用前面学
Less than 20 the number of subtraction (a position not enough minus) teaching content is the first edition of the Soviet version of the seventh chapter fifth. The content of this section is that students study the addition and subtraction of numbers within 10 and calculate the teaching contents arranged after the addition of decimals by adding 10 methods. The teaching methods cited in the textbook are: (1) hands-on operation, 2) Subtraction is the inverse of addition. These two kinds of teaching are suitable for first-year students’ age characteristics and are operable to adapt to different levels of student learning. In my teaching in this section, I came up with another algorithm - the conversion method, using the previous study