how do you learn multipulcation

The old fashioned way was to practice, practice, practice. Flashcards are useful.

You may try these sites.

http://www.mathblaster.com/free-game.aspx?pid=googpd&cid=%2Bmultiplication%20%2Blearn

http://www.honorpoint.com/

http://www.mathsisfun.com/tables.html

A few tricks:

The product of 5 times any number will end in either 5 or 0.

The product of 9 times any number will be a number with digits that add up with 9 or a multiple of nine