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(一)复习要点 1.实数的概念 (1)__和__统称有理数. (2)无限__小数叫做无理数. (3)有理数和无理数统称__. (4)规定了__、__和__的直线叫做数轴__数与数轴上的点一一对应. (5)只有符号不同的两个实数,叫做__.零的相反数是__;实数a与b互为相反数 a+b=__ (6)1除以一个不为零的数的商叫做这个
(1) Review points 1. The concept of real numbers (1) __ and __ are collectively called rational numbers. (2) Infinite __ decimals are called irrational numbers. (3) Rational and irrational numbers are collectively called __. (4) __, _ are specified The straight line between _ and __ is called number axis __ number corresponding to the point on the number axis. (5) Only two real numbers with different signs are called __. The opposite number of zero is __; The real numbers a and b are opposite to each other. The number a+b=__ (6)1 divided by a non-zero number of quotients is called this