Whole Numbers- Addition and Subtraction 2.1.5
Whole Numbers Addition and Subtraction is a good way to help you to add large numbers.
You don't have to rush into the test section right away. If you'd like, you can take a practice test first by clicking on the pencil, the pen is the test. If you get a 100%, you get to play a game, which is running around in a maze collecting coins. But watch out...the ghost will try to get you.