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《两位数减一位数(退位)》是小学数学国标本苏教版一年级下册P80-81的内容,是学生在学完两位数和一位数进位加法以及20以内退位减法的基础上进行教学的。在教学前和教学中我作了如下几点思考:
“Double-digit minus one-digit (abdication)” is the contents of P80-81, the first grade of primary school mathematics textbook Sujiao Version, which is the basis for the students to complete the two-digit and one-digit carry-in addition and abort subtraction within 20 On the teaching. Before teaching and teaching I made the following points: