If you want to challenge yourself with some pre-algebra, try this! https://docs.google.com/file/d/0B3UTxI53nx2pS0NQTEk3T3h3TEE/edit?usp=sharing
If you want to challenge yourself with some pre-algebra, try this! https://docs.google.com/file/d/0B3UTxI53nx2pS0NQTEk3T3h3TEE/edit?usp=sharing