Math is Mental

Teachers, mathematicians, and even students have developed several different mental math strategies throughout history.  They have however not been in the for front of mathematics as regularly since the invention of the calculator. 

                Just by Google searching “mental Math strategies” you will get thousands of hits for strategies for addition, subtraction, multiplication, division, fractions and more.  I have decided to put a spotlight on just a few commonly taught mental math methods. 

                Such as the “nines track for multiplication” in which by using your fingers you can discover the answer to most of the basic nines times tables. 

http://www.metacafe.com/watch/385234/cool_9_times_table_trick/

Here is a mental math method for finding the percent:

http://www.youtube.com/watch?v=x4mREPIzDIw

Here is a good mental math lesson for multiplying two digit numbers in your head

http://www.metacafe.com/watch/412541/cool_mental_math_trick/