If you want skilled and fun math games then go to:

Addition Games:

I will keep my eye out for some good addition games (If you know of some good addition math games then leave me the link to the game on my blog)

Division Games:

Snork's Long Division

Demolition Division

Multiplication Games:

Multiplication Practice

The Subtraction Machine

Subtraction Games:

Rags to Riches

All of the above:

Speedy Sums

Math at the Mall

Pumpkin Multiples

Math Magician

Math Baseball

Math Man