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160 lines
6.5 KiB
HTML
160 lines
6.5 KiB
HTML
<!DOCTYPE html>
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<html lang="en"><!-- #BeginTemplate "/Templates/Main.dwt" --><!-- DW6 -->
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<!-- Mirrored from www.mathsisfun.com/number-line.html by HTTrack Website Copier/3.x [XR&CO'2014], Sat, 29 Oct 2022 00:58:35 GMT -->
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<!-- #BeginEditable "doctitle" -->
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<title>Number Line</title>
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<!-- #EndEditable -->
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<meta name="keywords" content="math, maths, mathematics, school, homework, education">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<link rel="preload" href="main4.js" as="script">
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function gtag(){dataLayer.push(arguments);}
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gtag('js', new Date());
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gtag('config', 'UA-29771508-1');
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</script>
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</head>
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<body id="bodybg">
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<div id="stt"></div>
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<div id="adTop"></div>
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<header>
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<div id="hdr"></div>
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<div id="tran"></div>
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<div id="adHide"></div>
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<div id="cookOK"></div>
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</header>
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<div class="mid">
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<nav>
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<div id="menuWide" class="menu"></div>
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<div id="logo"><a href="index.html"><img src="images/style/logo.svg" alt="Math is Fun"></a></div>
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<div id="search" role="search"></div>
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<div id="linkto"></div>
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<div id="menuSlim" class="menu"></div>
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<div id="menuTiny" class="menu"></div>
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</nav>
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<div id="extra"></div>
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<article id="content" role="main">
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<!-- #BeginEditable "Body" -->
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<div class="video">9OzENFeK8GI</div>
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<h1 id="title" class="center">Number Line</h1>
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<p class="center"><b>Writing numbers down on a Number Line makes it easy to tell<br>
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which numbers are greater or lesser</b></p>
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<table style="border: 0; margin:auto;">
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<tbody>
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<tr>
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<td colspan="2" align="center"><img src="numbers/images/greater-less.svg" alt="greater less" height="59" width="137"></td>
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</tr>
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<tr>
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<td colspan="2" align="center"><img src="numbers/images/number-line.svg" alt="number line -10 to +10" height="47" width="595"></td>
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</tr>
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<tr>
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<td style="text-align:center;">Negative Numbers (−)</td>
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<td style="text-align:center;">Positive Numbers (+)</td>
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</tr>
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<tr>
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<td colspan="2" align="center"><i>(The line continues left and right forever.)</i></td>
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</tr>
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</tbody></table>
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<p class="center"> </p>
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<p class="larger">A number on the <b>left is less</b> than a number on the right.</p>
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<div class="example">
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<h3>Examples:</h3>
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<ul>
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<li><b>5</b> is less than <b>8</b></li>
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<li><b>−1</b> is less than <b>1</b></li>
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<li><b>−8</b> is less than <b>−5</b></li>
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</ul>
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</div>
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<p class="larger">A number on the <b>right is greater</b> than a number on the left.</p>
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<div class="example">
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<h3>Examples:</h3>
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<ul>
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<li><b>8</b> is greater than <b>5</b></li>
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<li><b>1</b> is greater than <b>−1</b></li>
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<li><b>−5</b> is greater than <b>−8</b></li>
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</ul>
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</div>
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<p class="larger">Try this interactive number line (click to mark):</p>
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<div class="script" style="height: 150px;">numbers/images/number-line.js?mode=int</div>
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<p>You can also try the <a href="numbers/number-line-zoom.html">zoomable number line</a>.</p>
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<div class="example"><img src="numbers/images/lunch.jpg" alt="lunch" style="float:right; margin: 0 0 5px 10px;" height="107" width="163">
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<h3>Example: Lunch</h3>
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<ul>
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<li>John borrowed $3 to pay for his lunch</li>
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<li>Virginia borrowed $5 to pay for her lunch</li>
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<li>Alex had enough money for lunch and has $3 left over</li>
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</ul>
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<p>Place these people on the number line to find who is poorest and who is richest.</p> <span class="center"></span>
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<p class="center"><b>Owing money</b> is <b>negative</b><br>
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<b>Having money</b> is <b>positive</b></p>
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<p>So John has "<span class="center">−</span>3", Virginia has "<span class="center">−</span>5" and Alex has "+3"</p>
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<p class="center"><img src="numbers/images/greater-less.svg" alt="greater less" height="59" width="137"><br>
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<img src="numbers/images/number-line-people.svg" alt="number line: -5, -3, 3" height="102" width="277"></p>
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<p>Now it is easy to see that:</p>
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<p class="center larger">Virginia is poorer than John (−5 is less than −3)<br>
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and John is poorer than Alex (−3 is less than 3)<br>
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and Alex is, of course, the richest!</p>
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</div>
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<h2>Using The Number Line</h2>
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<p>We can use the number line to help us add. We always move to the right to add.</p>
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<p>We can use the number line to help us subtract. We always move to the left to subtract.</p>
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<p class="center">Read <a href="numbers/number-line-using.html">How to Use the Number Line to Add and Subtract</a>.</p>
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<p class="center"> </p>
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<div class="fun">
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<h3><a name="absolute" id="absolute"></a>Footnote: Absolute Value</h3>
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<p><a href="numbers/absolute-value.html">Absolute Value</a> means to think only about <b>how far</b> a number is from zero.</p>
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<p class="center"><img src="numbers/images/absolute-value.svg" alt="absolute value -6 is 6, 6 is 6" height="98" width="590"></p>
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<p class="center">For example "6" is 6 away from zero, but "−6" is <b>also</b> 6 away from zero.</p>
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<p class="center">So the absolute value of 6 is 6, and the absolute value of −6 is also 6</p>
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</div>
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<p> </p>
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<a id="q"></a>
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<div class="questions">1661, 1662, 1663, 1664, 1665, 1666, 5644, 5645, 5643, 5649</div>
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<div class="related">
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<a href="whole-numbers.html">Whole Numbers and Integers</a>
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<a href="numbers/number-line-scroll.html">Scrolling Number Line</a>
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<a href="positive-negative-integers.html">Adding and Subtracting Positive and Negative Numbers</a>
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<a href="numbers/index.html">Number Index</a>
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<a href="algebra/index.html">Algebra Index</a>
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</div>
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<!-- #EndEditable -->
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</article>
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<div id="adend" class="centerfull noprint"></div>
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<footer id="footer" class="centerfull noprint"></footer>
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<div id="copyrt">Copyright © 2021 MathsIsFun.com</div>
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