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1
How To Read Number Lines.mov
How To Read Number Lines.mov
::2012/08/30::
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2
Counting 1 - 10 on the Number Line With Froggy
Counting 1 - 10 on the Number Line With Froggy
::2011/10/03::
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3
Placing Numbers on a Number Line
Placing Numbers on a Number Line
::2010/09/02::
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4
Pre-Algebra 4 - Whole Numbers, Integers, and the Number Line
Pre-Algebra 4 - Whole Numbers, Integers, and the Number Line
::2011/07/29::
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5
number line addition by Peter Weatherall
number line addition by Peter Weatherall
::2008/11/13::
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6
Number Line Song!
Number Line Song!
::2013/12/13::
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7
Comparing fractions visually and on number line
Comparing fractions visually and on number line
::2013/10/07::
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8
How to Read a Number Line
How to Read a Number Line
::2011/12/27::
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9
The Rappin
The Rappin' Mathematician: "The Number Line Dance"
::2009/02/02::
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10
Fractions on a number line
Fractions on a number line
::2013/10/07::
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11
Number Line - Numberphile
Number Line - Numberphile
::2013/07/30::
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12
Phish | 08.17.10 | Backwards Down the Number Line | Jones Beach Theater - Wantagh, NY
Phish | 08.17.10 | Backwards Down the Number Line | Jones Beach Theater - Wantagh, NY
::2010/08/19::
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13
Graphing Inequalities on a Number Line
Graphing Inequalities on a Number Line
::2008/03/15::
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14
Number Line
Number Line
::2011/11/01::
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15
Number line subtraction by Peter Weatherall
Number line subtraction by Peter Weatherall
::2008/11/13::
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16
5th Grade Module 1 C   Rounding on Vertical Number Line
5th Grade Module 1 C Rounding on Vertical Number Line
::2014/07/21::
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17
Learn Grade 1 - Maths - Number line
Learn Grade 1 - Maths - Number line
::2011/10/17::
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18
Lesson 12 From Ratio Tables to Double Number LIne Diagrams
Lesson 12 From Ratio Tables to Double Number LIne Diagrams
::2014/09/24::
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19
Plotting basic fractions on the number line
Plotting basic fractions on the number line
::2013/08/02::
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20
Basic Math : How to Draw a Number Line
Basic Math : How to Draw a Number Line
::2011/03/12::
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21
Numberline (little extra bit)
Numberline (little extra bit)
::2013/08/19::
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22
Points on a number line
Points on a number line
::2011/01/19::
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23
Open Number Line Basics
Open Number Line Basics
::2010/09/19::
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24
Locating decimals on number line
Locating decimals on number line
::2011/02/26::
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25
Division on a number line
Division on a number line
::2009/07/04::
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26
Adding Integers Using a Number Line
Adding Integers Using a Number Line
::2010/11/05::
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27
2.MD.6 - Addition Using the Number Line (Part 1 of 2)
2.MD.6 - Addition Using the Number Line (Part 1 of 2)
::2012/02/07::
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28
Fractions and Mixed Numbers on a Number Line
Fractions and Mixed Numbers on a Number Line
::2012/07/20::
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29
Learn Multiplication Facts using Number Line
Learn Multiplication Facts using Number Line
::2011/10/21::
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30
Number line number Rap ( He Snapped ) # freestyle
Number line number Rap ( He Snapped ) # freestyle
::2013/12/15::
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31
Elapsed Time Number-Line
Elapsed Time Number-Line
::2013/01/11::
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32
Phish - Backwards Down The Number Line
Phish - Backwards Down The Number Line
::2010/06/20::
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33
Using Double Number Line Diagrams
Using Double Number Line Diagrams
::2012/12/18::
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34
Rounding with a Vertical Number Line - Engage NY Math - Common Core
Rounding with a Vertical Number Line - Engage NY Math - Common Core
::2013/09/21::
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35
Very Basics of Graphing Inequalities (on a number line)
Very Basics of Graphing Inequalities (on a number line)
::2013/05/31::
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36
Learn Grade 1 - Maths - Subtraction Using Number line
Learn Grade 1 - Maths - Subtraction Using Number line
::2011/10/03::
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37
Rational number on a number line
Rational number on a number line
::2011/06/01::
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38
Fractions on Number Lines - v2
Fractions on Number Lines - v2
::2012/09/18::
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39
Phish - Backwards Down the Number Line 8-31-13 Commerce City, CO live
Phish - Backwards Down the Number Line 8-31-13 Commerce City, CO live
::2013/09/01::
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40
Multiplying With a Number Line
Multiplying With a Number Line
::2014/04/04::
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41
Representing Irrational numbers (√2, √3) on the number-line (Part-3)
Representing Irrational numbers (√2, √3) on the number-line (Part-3)
::2012/04/23::
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42
Heartaches By The Number - line dance (BM Leong)
Heartaches By The Number - line dance (BM Leong)
::2014/07/04::
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43
Learn Grade 1 - Maths - Addition Using Number line
Learn Grade 1 - Maths - Addition Using Number line
::2011/10/03::
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44
Counting 10 - 20 on the Number Line with Froggy
Counting 10 - 20 on the Number Line with Froggy
::2011/10/03::
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45
Place fractions on a number line (1) - 3.NF.2
Place fractions on a number line (1) - 3.NF.2
::2011/11/22::
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46
Double Number Line
Double Number Line
::2013/08/27::
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47
Phish | 12.31.10 | Backwards Down the Number Line
Phish | 12.31.10 | Backwards Down the Number Line
::2011/01/02::
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48
How to Teach Fractions on a Number Line using Fraction Tower Cubes
How to Teach Fractions on a Number Line using Fraction Tower Cubes
::2013/09/20::
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49
class 9 - math
class 9 - math's -- √5 on number line - lakshya education - math's guru no.1
::2013/03/22::
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50
Algebra 6 - Interval Notation and the Number Line
Algebra 6 - Interval Notation and the Number Line
::2012/06/29::
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From Wikipedia, the free encyclopedia
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This article is about the mathematical concept. For the printer's key, see Printer's key.
This article covers basic topics. For advanced topics, see Real line.

In basic mathematics, a number line is a picture of a straight line on which every point is assumed to correspond to a real number and every real number to a point.[1] Often the integers are shown as specially-marked points evenly spaced on the line. Although this image only shows the integers from −9 to 9, the line includes all real numbers, continuing forever in each direction, and also numbers not marked that are between the integers. It is often used as an aid in teaching simple addition and subtraction, especially involving negative numbers.

The number line

It is divided into two symmetric halves by the origin, that is the number zero.

In advanced mathematics, the expressions real number line, or real line are typically used to indicate the above-mentioned concept that every point on a straight line corresponds to a single real number, and vice versa.

Drawing the number line[edit]

The number line is usually represented as being horizontal. Positive numbers always lie on the right side of zero, and negative numbers always lie on the left side of zero. An arrowhead on either end of the drawing is meant to suggest that the line continues indefinitely in the positive and negative real numbers, denoted by \mathbb{R}. The real numbers consist of irrational numbers and rational numbers, as well as the integers, whole numbers, and the natural numbers (the counting numbers).

A line drawn through the origin at right angles to the real number line can be used to represent the imaginary numbers. This line, called imaginary line, extends the number line to a complex number plane, with points representing complex numbers.

See also[edit]

References[edit]

  1. ^ Stewart, James B.; Redlin, Lothar; Watson, Saleem (2008). College Algebra (5th ed.). Brooks Cole. pp. 13–19. ISBN 0-495-56521-0. 
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