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从小学数学到初中数学,对初一学生来说是一个飞跃。不论从量的方面,还是从质的方面,都有一个逐步适应的过程。初一的同学要想学好数学,应该特别注意对有理数概念的理解。引入负数之后,我们对整数和分数的认识有了发展,整数包括正整数、零、负整数,分数包括正分数、负分数,整数和分数统称为有理数。我们还可以按正负性来分:
From elementary school mathematics to junior high school mathematics, it is a leap forward for first grade students. In terms of quantity, or quality, there is a gradual adaptation process. Students who want to learn mathematics in the first day should pay special attention to understanding the concept of rational numbers. With the introduction of negative numbers, our knowledge of integers and fractions has evolved. Integer numbers include positive integers, zero and negative integers, fractions include positive and negative fractions, and integers and fractions are collectively referred to as rational numbers. We can also be positive or negative points: