Here is a really quick way to square any number with a 5 on the end. *****You need to be logged and have a PREMIUM membership plan to see this part of the post. Login using the box in the sidebar. Not registered? Click here to register. Check you Membership Page for details on how [...]
How do we multiply by eleven easily? First we will try this by writing the answer backwards. So, when always multiplying a large number by 11, the last number will always be the last number of the sum we are multiplying. Let me explain. *****You need to be logged and have a PREMIUM membership plan [...]
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