学生　有理数和无理数有什么区别 ?老师　主要区别有两点 :1.把有理数和无理数都写成小数形式时 ,有理数能写成有限小数或循环小数 ,比如 4 =4 .0 ;45=0 .8;110 =0 .1;13=0 .333…而无理数只能写成无限不循环小数 ,比如 2 =1.4 14 2… ,根据这一点 ,人们把无理数定义为无限不循 What is the difference between the students rational number and irrational number? There are two main differences between the teacher: 1. When the rational number and irrational number are written in decimal form, rational numbers can be written as a finite decimal or cyclic decimal, such as 4 = 4 .0; 45 = .8; 110 =0 .1;13=0.333... and irrational numbers can only be written as infinitely non-repeating decimal numbers, such as 2 =1.4 14 2... , according to which, people define irrational numbers as infinite