“实数”是初中数学的“数与代数”中的重要内容,是中学数学的基础知识.实数的相关概念以及实数的运算是历届中考的必考知识点,通常实数的相关概念中的相反数、绝对值、倒数以选择题的形式出现在第1题,分值为3分;科学记数法以选择题的形式出现,分值为3分;实数的运算出现在19题的第(1)小题,分值 “Real number ” is an important content in “Number and algebra ” of junior high school mathematics, which is the basic knowledge of high school mathematics .Relationship between real numbers and real numbers are the necessary knowledge of previous entrance examinations. In the opposite, absolute, reciprocal in the form of multiple-choice questions in the first question, the score is 3 points; scientific notation in the form of multiple-choice questions, score of 3 points; the real number of operations appear in 19 questions The first (1) Quiz points