论文部分内容阅读
问题:小明在学习完小学数学之后,向同学提出了这样一个问题:“一张桌子+一张椅子=?”这是一道小学生非常喜欢讨论的问题.其实,问题本身包含着数学从简单向抽象认识的一次重要的飞跃.一方面,它凝集了数量的和的运算关系,另一方面,也融入从数的运算抽象到形的运算.’一、有理数的加减运算1.有理数的加法.有理数加法法则(摘自文[1]).①同号两数相加,取相同的符号,并把绝对值相加.
Problem: After learning elementary school math, Xiao Ming asked the classmate a question like this: “A table + a chair =?” This is an issue that pupils like to discuss very much. In fact, the problem itself contains simple mathematics An important leap forward to abstract understanding, on the one hand, it aggregates the relation of the numbers and the sum, on the other hand, it also incorporates arithmetic abstractions from the numbers into the arithmetic operations. Addition. Rational addition rule (taken from the article [1]). ① The same two numbers added together, take the same symbol, and the absolute value of the sum.