10 Great Math Tricks to Do Calculations in Your Head


	10 Great Math Tricks to Do Calculations in Your Head
abhiator
10-9-2007 10:17 AM
154 views
tags:
10 great math tricks to do calculations in your he
abhiator says:
10 Great Math Tricks to Do Calculations in Your Head
Add a Comment
Login to Comment. Not a member yet? Sign up
Related Clips

More clips from abhiator

motorcycle stunts
This is How We Roll in India
Mask
Today's Top Clips

visit the Top Clips page
View the Top Clips from October 9, 2007
Embed This Clip In Your Site...
<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/03037a10-bee5-4425-a8c4-524e6d98fd3d/A47E3115-81A1-4E20-9538-11DC91A464D0/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://listverse.com/science/10-easy-arithmetic-tricks/" href="http://listverse.com/science/10-easy-arithmetic-tricks/" style="font-size: 11px;">listverse.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P><A href="http://listverse.com/wp-content/uploads/2007/09/galoisfieldlib.png"><IMG width="250" vspace="4" hspace="4" height="250" border="1" src="http://listverse.com/wp-content/uploads/2007/09/galoisfieldlib-tm.jpg" alt="Galoisfieldlib" /></A></P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P><SPAN class="litem">1. The 11 Times Trick</SPAN></P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><DIV align="center" width="100%"><DIV><P>We all know the trick when multiplying by ten - add 0 to the end of the number, but did you know there is an equally easy trick for multiplying a two digit number by 11?  This is it:</P></DIV></DIV></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>Take the original number and imagine a space between the two digits (in this example we will use 52:</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>5_2</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>Now add the two numbers together and put them in the middle:</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>5_(5+2)_2</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>That is it - you have the answer: 572.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P><SPAN id="more-2096"></SPAN>If the numbers in the middle add up to a 2 digit number, just insert the second number and add 1 to the first:</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>9_(9+9)_9</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>(9+1)_8_9</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><DIV align="center" width="100%"><DIV><P>10_8_9</P></DIV></DIV></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>1089 - It works every time.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P><SPAN class="litem">2. Quick Square</SPAN></P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>If you need to square a 2 digit number ending in 5, you can do so very easily with this trick.  Mulitply the first digit by itself + 1, and put 25 on the end.  That is all!</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>25<SUP>2</SUP> = (2x(2+1)) & 25</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>2 x 3 = 6</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>625</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P><SPAN class="litem">3. Multiply by 5</SPAN></P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><P>Most people memorize the 5 times tables very easily, but when you get in to larger numbers it gets more complex - or does it?  This trick is super easy.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://listverse.com/science/10-easy-arithmetic-tricks/"><DIV class="art-title"><A href="http://listverse.com/science/10-easy-arithmetic-tricks/" rel="bookmark" title="Permalink: 10 Easy Arithmetic Tricks">10 Easy Arithmetic Tricks</A></DIV></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/A47E3115-81A1-4E20-9538-11DC91A464D0/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
Clipmarks: Home; New Clips; Top Clips; Dashboard
Popular Topics: News; Life; Science; Technology; Entertainment
Get Started: Sign Up; Install Clipping Tool; How Clipping Works; Clip-to-Blog™; ClipSearch
Tools and Resources: FAQ; ClipWeek; Top Clippers; Top Tags; Site Map
About Clipmarks: About Us; Contact; Blog; Copyright; Privacy; EULA
Search Options

Related Clips

More clips from abhiator

Today's Top Clips
