Irrational number defines irrational number, also known as infinite acyclic decimal, which cannot be written as the ratio of two integers. If written in decimal form, there are infinitely many digits after the decimal point, which will not cycle. Common irrational numbers include the square root, π and E (the latter two are transcendental numbers) of incomplete square numbers. Another feature of irrational numbers is the expression of infinite connected fractions. Irrational numbers were first discovered by a disciple of Pythagoras.
Definition of rational number Rational number refers to an integer that can be regarded as a fraction, and the denominator is 1. Positive integers, 0, negative integers, positive fractions and negative fractions can all be written in the form of fractions, and such numbers are called rational numbers. The decimal part of a rational number is a finite decimal or a cyclic decimal. Real numbers that are not rational numbers are called irrational numbers.
Natural numbers define numbers used to measure the number of things or to indicate the order of things. That is, the numbers represented by the numbers 0, 1, 2, 3, 4, ... representing the number of objects are called natural numbers, and natural numbers start from 0 and form an infinite group one by one.
The definition of a fraction is to divide the unit "1" into several parts on average, and the number representing such a part or parts is called a fraction. The number representing this share is called the fractional unit.
Scores are divided into false scores and true scores. False scores are divided into fractions and integers. The numerator and denominator are coprime, and this score is called simplest fraction. It is necessary to divide the decimal into several decimal places to determine the denominator, and then look at the number after the decimal point, which is the numerator. If there is an integer, it becomes a fraction.