Vectors and 3D Models
Local Search - Education
Weather Information
Get the App for Smartphones and Tablets

Go Back


WhmSoft Free Articles Directory
Free Articles for Reprint
Free Articles to Publish
Free Articles for Newsletters
Videos to Watch


Page Generation Date and Time:
10/18/2017 01:57:08

 
Free the Animation VR / AR
Play to reveal 3D images and 3D models!
 
Android app on Google Play
 
vlrPhone / vlrFilter
Project of very low consumption, radiation and bitrate softphones, with the support of the spatial audio, of the frequency shifts and of the ultrasonic communications / Multifunction Audio Filter with Remote Control!



 
 
Alexa Data
 

Go To Articles Directory Home Page

To get the current article, - See Below (at the bottom of the page) -.
For top news titles, see below.
Web sites and videos listed in this page are frequently updated.
If you find that this page is useful (quality of web sites, images and videos, ...), you can add it to your favorites.
Bookmark Page !

Tell a Friend:



With your mobile phone (WAP / I-Mode / iPhone / PDA), for free:
The Top News - http://www.whmsoft.net/services/wap/news.php
The Daily Files - http://www.whmsoft.net/services/wap/get.php
All the Directory Files - http://www.whmsoft.net/services/wap/choose.php

Web version of feeds:
Podcast Music - http://www.whmsoft.net/services/web/wpodcast.php
Daily Files - http://www.whmsoft.net/services/web/wget.php

You can play the Guitar Drum Revolution game (flash game) by following the link below:
Play Guitar Drum Revolution Game


You can play free online games (flash games) by following the link below:
Free Online Games

Play the samples below:
Dynasty StreetLafontaineShootingHabiller DoraMysteries Of Horus

You can view the people (celebrities) news and the front page news (with videos, images and constant updates) by following the link below:
View Recent News
or by visiting the WhmSoft Service blog:
News Photos Slideshows


Article Keyword Videos to Watch
Education
Click on the image to start the video.



Related Topics
Images - Links - Articles

Washington


Related Images



Article Category Videos to Watch
Education
Go to the Videos Pages


Math Shortcuts To Amaze Your Friends

I had my own math shortcuts when I was a child. Using these meant that I didn't "show my work" in math class, as was required. This annoyed many of the teachers, and lowered my grades. I did get the correct solutions to my math problems, however. I was simply using different algorithms, ones which I had a hard time expressing on paper.

In my thinking, for example, 97 x 16 became 100 x 16 (1600) minus 3 x 16 (48). It was easier that way, and thinking this way became almost automatic. As a result, I might just write down 1552 even though I couldn't explain very well how I arrived at the answer. My teachers called that a problem, but many years later such math shortcuts were being sold in seminars and books.

Making Your Own Math Shortcuts

You can make your own math shortcuts. The following may give you some ideas on how to do that. Alternately, you can try any of the shortcuts and algorithms you read about and adopt the ones that are best suited to you. There are no perfect techniques for all people, because our minds work in slightly different ways.

For example, suppose you want to multiply 68 x 6. My mind immediately thinks "60 x 6 = 360 and 8 x 6 = 48, and 360 + 48 is 408." That is one way to quickly arrive at a solution without pen and paper. It is essentially this: (60 x 6) + (8 x 6) = 408.

Want another way? Think of it as (70 x 6) - (2 x 6). The "internal dialog" might be something like this: "70 x 6 = 420, but that is two "sixes" too many, so take away two sixes (12) and I have 408." The point is that there is often more than one way, and you can use whichever math shortcut is easier for you.

If the problem was 68 x 9, by the way, my mind immediately focuses on the 9. Why? Because it is close to 10, and multiplying by 10 is easy. 68 x 10 is 680, from which I just have subtract the extra 68 to arrive at the solution of 612. Always look for the numbers that are close to 10 or 100 or 1000, and you'll find the easier way to do the math, especially if you are trying to do it in your head.

Percentages can be trickier to do as mental math, but there are ways. Suppose, for example, that you want to figure what the 4.6% sales tax will amount to on your book. One quick way to estimate it is to take 10%, or .90, cut that in half to arrive at 5%, or .45, and then just guess at around .35, because you know 4.6% is a little less than 5%. Alternately, you could think of 5% as a 20th of the price - if this is easier - and then round that figure down a bit.

What if you want a more precise solution? 1% of is easy to arrive at (.29), so multiply that by 4 to arrive at .16. (You might think of this as (4 x 30) - 4.) Now you just need to add .6% to that. Think 6 x 29 = 174, and then put the decimal in the right place: .174. Add that .18 (round it up as the store will likely do) to the 1.16 and you have .34 in sale's tax, pretty close to our quick estimate. This is not as difficult as it might seem once you practice these shortcuts a bit.

These simple methods do require a basic understanding of math. If you don't understand that 123 multiplied by 199 is just adding 123 to itself 199 times - that multiplication is just another way to do addition - you will have problems with these math shortcuts. In that case, you may want to simply use the easiest math shortcut of all - a calculator.

Oh and the solution to that last one is 24,477. And yes, I did do that in my head.


About the Author: Copyright Steve Gillman. For more on How To Increase Brain Power, and to get the Brain Power Newsletter and other free gifts, visit:
http://www.IncreaseBrainPower.com




Recommended Web Site(s):

Easy Articles Home Page - Articles Directory

Recommended WhmSoft Web Sites, Feeds and WAP Address:

WhmSoft Software Home Page - Software
WhmSoft Services Login Page - Music and Images
WhmSoft Moblog Home Page - Blog - Photo Gallery
WhmSoft Free Online Games Home Page - Flash Games
WhmSoft Services RSS Feed - Daily Music, Image and 3D Flash Animation
Classical Music with Drum RSS Feed - MIDI and MP3 Files
Classical Music with Drum Podcast Feed - MP3 and MP3 Files
WAP / I-Mode / PDAs - Daily Music, Image and Flash Animation

Home Pages:

WhmSoft Free Articles for Reprint Home Page
WhmSoft Services Home Page - Music and Images
Copyright (C) 2006-2017 WhmSoft - All Rights Reserved.