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127 lines
5.6 KiB
HTML
127 lines
5.6 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/numbers/addition-column.html by HTTrack Website Copier/3.x [XR&CO'2014], Sat, 29 Oct 2022 01:01:16 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>Addition in Columns</title>
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<meta name="Description" content="Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.">
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<meta name="keywords" content="math, maths, mathematics, school, homework, education">
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<link rel="preload" href="../images/style/font-champ-bold.ttf" as="font" type="font/ttf" crossorigin="">
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<link rel="preload" href="../style4.css" as="style">
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<link rel="preload" href="../main4.js" as="script">
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<link rel="stylesheet" href="../style4.css">
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<script src="../main4.js" defer="defer"></script>
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<script>
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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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<article id="content" role="main">
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<!-- #BeginEditable "Body" -->
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<div class="video">hrMzRk0Z9vk</div>
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<h1 id="title" align="center">Addition in Columns</h1>
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<p class="large">We can do addition by writing one number below the other<br>
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and then add <b>one column at a time</b>, like this:</p>
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<iframe src="iadd-cole420.html?adda=13&addb=23" scrolling="no" style="width:362px; height:132px; overflow:hidden; margin:auto; display:block; border: none;"></iframe>
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<p class="large">And it works for bigger numbers, too:</p>
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<iframe src="iadd-col2720.html?adda=62&addb=81" scrolling="no" style="width:362px; height:132px; overflow:hidden; margin:auto; display:block; border: none;"></iframe>
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<p class="large">But sometimes <b>two-digit numbers can get in the way</b> like this:</p>
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<iframe src="iadd-col8639.html?adda=16&addb=16&bad=1" scrolling="no" style="width:362px; height:132px; overflow:hidden; margin:auto; display:block; border: none;"></iframe>
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<p class="large"><b>THIS</b> is how it <b>should be done</b>:</p>
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<iframe src="iadd-cola495.html?adda=16&addb=16" scrolling="no" style="width:362px; height:132px; overflow:hidden; margin:auto; display:block; border: none;"></iframe>
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<p> </p>
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<p style="float:left; margin: 0 30px 5px 0;"><img src="images/add-carry-above.svg" alt="addition: carry above" height="130" width="183"></p>
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<p>Did you see how we split the 12 into <b>1 Ten</b> and <b>2 Ones</b>?</p>
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<p>We then sent the<b> 1 Ten</b> to the<b> top of the Tens column,</b> so we will remember to add it when we do the Tens.</p>
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<div style="clear:both"></div>
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<p>And there is a nice clear space for the Tens answer below.</p>
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<p> </p>
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<p>Here's another example:</p>
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<iframe src="iadd-col9318.html?adda=38&addb=26" scrolling="no" style="width:362px; height:132px; overflow:hidden; margin:auto; display:block; border: none;"></iframe>
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<p>Now practice on this <a href="../worksheets/printc907.html?w=34175&ID=16155">Column Addition (with Carrying) Worksheets</a><a href="../worksheets/print4a02.html?w=34170&ID=5450"></a>.</p>
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<div class="def">
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<h3>Above or Below?</h3>
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<p style="float:right; margin: 0 0 5px 10px;"><img src="images/add-carry-below.svg" alt="add carry below" height="96" width="53"></p>
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<p>Your teacher may want you to put the "1" <b>below</b> like in this example.</p>
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<p>Above or below does not really matter, we just need a good place to put the "1" so we <b>don't forget it</b>!</p>
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</div>
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<h2>What About Bigger Numbers?</h2>
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<p>The same method works with numbers in the hundreds, thousands and so on.</p>
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<p>But we must be careful to <b>move over one column</b> each time.</p>
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<p>Like this:</p>
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<iframe src="iadd-colbb7f.html?adda=428&addb=395" scrolling="no" style="width:362px; height:132px; overflow:hidden; margin:auto; display:block; border: none;"></iframe>
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<p> </p>
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<a id="q"></a>
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<div class="questions">4047, 4048, 4049, 4050, 4798, 4799, 4800, 4801, 4945, 4946, 4947</div>
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<div class="related">
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<a href="addition.html">Addition</a>
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<a href="addition-tips-tricks.html">Addition Tips and Tricks</a>
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<a href="addition-table.html">Addition Table</a>
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</div>
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</article>
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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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