en.wikipedia.org/wiki/Real_number

In mathematics, a real number is a value that represents a quantity along a line. The adjective real in this context was introduced in the 17th century by René ...

www.mathsisfun.com/numbers/real-numbers.html

Mathematicians also play with some special numbers that that aren't Real Numbers. The Real Number Line. The Real Number Line is like a geometric line.

www.mathsisfun.com/definitions/real-number.html

The type of number we normally use, such as 1, 15.82, −0.1, 3/4, etc. Positive or negative, large or small, whole numbers or decimal numbers are all Real ...

virtualnerd.com/pre-algebra/real-numbers-right-triangles/real-and-irrational/define-real-numbers/real-number-definition

Note: Real numbers are numbers that can be found on the number line. This includes both the rational and irrational numbers. This tutorial explains real ...

whatis.techtarget.com/definition/real-number

A 'real number' is any element of the set R, which is the union of the set of a rational numbers and the set of irrational numbers.

www.mathwords.com/r/real_numbers.htm

This includes (but is not limited to) positives and negatives, integers and rational numbers, square roots, cube roots , π (pi), etc. Real numbers are indicated by ...

www.mathplanet.com/education/algebra-1/exploring-real-numbers/calculating-with-real-numbers

When adding real numbers with different signs you subtract the lesser absolute value from greater one. The sum will then have the same sign as the number ...

www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/alg-irrational-numbers-intro/v/square-roots-and-real-numbers

An old video of Sal where he simplifies square roots in order to determine whether they represent rational or irrational numbers.

real-numbers.bandcamp.com

Real Numbers Wordless Wonder, released 14 October 2016 1. Frank Infatuation 2. Wordless Wonder 3. Just So Far Away 4. Only Two Can Play 5. Falling Out 6.

www.mathopenref.com/real-number.html

A real number is a value that represents a quantity along a number line.