Use this page to find out which of the facts you need to work on.
Here is a video on the online pre-tests (and post-tests) that are available at multiplication.com. and how to print out a multiplication table from www.mathsisfun.com.
Take the online pre-tests. Make a list of the facts that give you difficulty. You will need to learn a strategy for memorizing these facts.
For the online pre-test. You can press Refresh and take it again.
Print out the multiplication table or use the table from multiplicaton.com. (Here is one up to 15x15.)