... Factions and Rational Numbers 分数与有理数 negative rational numbers 负有理数 Rational & Irrational Numbers 有理数与无理数 ...
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My dear, you are positive, I was negative, we are all rational numbers is really a natural pair ah!
亲爱的，你是正数，我是负数，我们都是有理数，真是天生的一对啊！
When first meet negative numbers, students have difficulty understanding both the meaning of negative numbers and the rules of operation between rational numbers.
学生初次接触到负数的概念时，对理解负数的意义及有理数的运算法则都会产生困难。
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