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144 lines
6.0 KiB
HTML
144 lines
6.0 KiB
HTML
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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>Add Two Numbers and the Answer is Always 1089</title>
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<meta name="keywords" content="math, maths, mathematics, school, homework, education">
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<!-- #BeginEditable "Body" -->
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<h1 class="center">Always End With 1089</h1>
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<h3 class="center">Add two numbers together and always end with 1089.<br> <br>
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Here is How:</h3>
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<div class="center">
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<div style="display:inline-block; max-width:200px;"> Pick a three digit number.
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<b> The three digits used must be different</b>*. i.e. 123
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</div>
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<div style="display:inline-block; width:50px;">
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<img src="images/arrow.gif" alt="right arrow" height="30" width="30">
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</div>
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<div style="display:inline-block; max-width:200px;">Reverse that number. 123 becomes 321</div>
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<p class="center"> <img src="images/arrow2.gif" alt="arrow new line" height="47" width="320"> </p>
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<div class="center">
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<div style="display:inline-block; max-width:200px;">Take the smallest three digit number from the largest.
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<br> 321 − 123 = 198
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</div>
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<div style="display:inline-block; width:50px;">
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<img src="images/arrow.gif" alt="right arrow" height="30" width="30">
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</div>
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<div style="display:inline-block; max-width:200px;">Take the answer and reverse that number. 198 becomes 891</div>
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</div>
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<p class="center"> <img src="images/arrow2.gif" alt="arrow new line" height="47" width="320"> </p>
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<div class="center">
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<div style="display:inline-block; max-width:200px;">Add that number to the
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answer of the subtraction.
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<br>891 + 198 = 1089
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</div>
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<div style="display:inline-block; width:50px;">
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<img src="images/arrow.gif" alt="right arrow" height="30" width="30">
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</div>
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<div style="display:inline-block; max-width:200px;">
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<h3>The answer will be 1089!</h3>
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</div>
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</div>
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<div class="center">
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<h4>So why does it do this? <br> <a href="1089algebra.html">Find out here</a></h4>
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</div>
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<div class="center">
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<br>
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</div>
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<br>
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<div class="center80">
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<h3>Footnotes</h3>
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<p>* But I ended with <b>198</b> not <b>1089</b> ... !</p>
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<p>This happens if you pick
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a number like 546. </p>
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<p>546 goes like this: 645−546=99, then 99+99=198. </p>
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<p>BUT if you assume that <b>099 is a 3 digit number</b>, you will get: <br>
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990−099=891, and 891+198=1089</p>
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<p><br></p>
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<p>* If you don't pick three different digits then this might happen: <br>
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343−343=0, 0+0=0</p>
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</div>
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<p> </p>
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<div class="related">
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<a href="algebra/index.html">Algebra Index</a>
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Copyright © 2019 MathsIsFun.com
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