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实数是有理数和无理数的统称 .从有理数到实数实际是数的范围的扩充 ,学习有理数到无理数的过程 ,实质上是学习实数的过程 ,是从有限小数和无限循环小数扩充到无限不循环小数 (即无理数 )的过程 .因此在学习实数时要充分认识实数的真正含义及实数的一些非概念的因素 :1 .实数a
Real numbers are the collective names of rational numbers and irrational numbers. From rational numbers to real numbers, the expansion of the real range of numbers, the process of learning rational numbers to irrational numbers is essentially the process of learning real numbers, and it is extended from finite decimal and infinite loop decimal to infinite loopless decimal ( This is the process of irrational numbers. Therefore, when studying real numbers, we must fully understand the real meaning of real numbers and some non-conceptual factors of real numbers: 1. Real number a