Addition and subtraction mixed practice -- get 20 right in one minute -- it's a race!
Multiplication practice -- get 20 right in one minute.
Here is a mutiplication mystery game -- have fun with it!
When you get a chance, look over this lesson on Prime Numbers. We'll be looking at primes, factors and multiples next time.
PS, please leave me a comment and let me know if you find this stuff too hard, too easy or just plain too much! We'll find a good balance that works for you. ;-)