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1
How To Read Number Lines.mov
How To Read Number Lines.mov
::2012/08/31::
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2
Placing Numbers on a Number Line
Placing Numbers on a Number Line
::2010/09/02::
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3
Fractions on a number line
Fractions on a number line
::2013/10/07::
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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 - Numberphile
Number Line - Numberphile
::2013/07/30::
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6
Graphing Inequalities on a Number Line
Graphing Inequalities on a Number Line
::2008/03/15::
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7
number line addition by Peter Weatherall
number line addition by Peter Weatherall
::2008/11/13::
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8
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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9
Points on a number line
Points on a number line
::2011/01/19::
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10
The Rappin
The Rappin' Mathematician: "The Number Line Dance"
::2009/02/02::
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11
Number line subtraction by Peter Weatherall
Number line subtraction by Peter Weatherall
::2008/11/13::
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12
Plotting basic fractions on the number line
Plotting basic fractions on the number line
::2013/08/02::
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13
Fractions on Number Lines - v2
Fractions on Number Lines - v2
::2012/09/18::
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14
Comparing fractions visually and on number line
Comparing fractions visually and on number line
::2013/10/07::
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15
Equivalent fractions visually and on number line
Equivalent fractions visually and on number line
::2013/10/07::
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16
Inequalities on a number line
Inequalities on a number line
::2011/01/25::
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17
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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18
Phish - Backwards Down The Number Line
Phish - Backwards Down The Number Line
::2010/06/21::
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19
Number line number Rap ( He Snapped ) # freestyle
Number line number Rap ( He Snapped ) # freestyle
::2013/12/15::
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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
Locate integers on a number line
Locate integers on a number line
::2011/07/15::
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22
Elapsed Time Number-Line
Elapsed Time Number-Line
::2013/01/11::
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23
Decimals on a Number Line
Decimals on a Number Line
::2011/07/18::
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24
Number Line
Number Line
::2011/11/01::
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25
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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26
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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27
How to Read a Number Line
How to Read a Number Line
::2011/12/28::
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28
Plotting inequalities on a number line
Plotting inequalities on a number line
::2013/07/16::
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29
Fractions and Mixed Numbers on a Number Line
Fractions and Mixed Numbers on a Number Line
::2012/07/20::
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30
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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31
Learn Grade 1 - Maths - Subtraction Using Number line
Learn Grade 1 - Maths - Subtraction Using Number line
::2011/10/03::
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32
How to find the square root of 2 on a number line
How to find the square root of 2 on a number line
::2013/05/16::
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33
Open Number Line Basics
Open Number Line Basics
::2010/09/19::
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34
Learn Multiplication Facts using Number Line
Learn Multiplication Facts using Number Line
::2011/10/21::
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35
Class IX Math-Number Systems:Representation on Number Line Part 2
Class IX Math-Number Systems:Representation on Number Line Part 2
::2013/05/10::
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36
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
::2010/08/20::
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37
Learn Grade 1 - Maths - Addition Using Number line
Learn Grade 1 - Maths - Addition Using Number line
::2011/10/03::
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38
Fractions on Number Lines - v1
Fractions on Number Lines - v1
::2012/09/18::
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39
Fractions on a Number Line
Fractions on a Number Line
::2010/12/26::
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40
Rational number on a number line
Rational number on a number line
::2011/06/01::
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41
Locating decimals on number line
Locating decimals on number line
::2011/02/27::
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42
How to unregister phone number line app
How to unregister phone number line app
::2013/03/08::
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43
Using a number line to help children learn to add up
Using a number line to help children learn to add up
::2013/05/01::
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44
Division on a number line
Division on a number line
::2009/07/04::
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45
Place Value - Decimals on a Number Line (5-NBT-4 part 1)
Place Value - Decimals on a Number Line (5-NBT-4 part 1)
::2012/09/30::
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46
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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47
Decimals on a Number Line
Decimals on a Number Line
::2011/11/04::
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48
Algebra 6 - Interval Notation and the Number Line
Algebra 6 - Interval Notation and the Number Line
::2012/06/29::
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49
Representing root 9.3 on numberline
Representing root 9.3 on numberline
::2013/05/15::
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50
Place improper fractions on a number line - 5.NF.3
Place improper fractions on a number line - 5.NF.3
::2011/11/22::
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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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