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新编的1957年春季用的初小算术第二册课本,内容比过去的更加充实而有系统。现在就谈谈新旧课本主要不同的地方。一、课题名称有了更改,教材的排列顺序也有变动。首先,新课本把原来的“20以内的不进位加法和不退位减法”、“20以内的进位加法”与“20以内的退位减法”这几个课题,改为“20以内的不超十的加法和减法”、“超十的加法”与“超十的减法”。同时把不超十的加法和减法部分的“十几加几”、“十几减几和二十减几”、“十几减十几和二十减十几”三节,改称“两位数加一位数”、“减数是一位数的减法”、“两位数减两位数”。这样,教材的性质便更加明确了。
The second volume of the new elementary school math book, Spring 1957, is more substantiated and systematic than in the past. Now talk about the main difference between old and new textbooks. First, the subject name has changed, the order of teaching materials have changed. First of all, the new textbook to the original “less than 20 non-carry addition and non-abatement subtraction”, “plus carry within 20” and “less than 20 abatement subtraction of” these issues, “less than 20 less than ten Addition and Subtraction ”,“ Addition of Ultra 10 ”and“ Subtraction of Ultra 10 ”. At the same time not more than ten addition and subtraction part of the “ten plus a few”, “a dozen minus a few and twenty minus a few”, “a dozen minus ten and twenty minus ten” three, renamed the “double digit Plus one digit ”,“ subtraction is a one-digit subtraction ”,“ two digits minus two digits ”. In this way, the nature of teaching materials will be more clear.