I believe this was the first math game I ever invented. Of course, ideas are common currency, so I’m sure other math teachers thought of it before I did. But to me, it was original.

I’ve blogged about the game before, but here’s the updated version as it appears in my new book *Prealgebra & Geometry: Math Games for Middle School* — scheduled for publication in early 2021. Sign up for my newsletter to get updates.

### Hit Me

**Math Concepts:** integer addition, absolute value.

**Players:** two or more.

**Equipment:** playing cards (two decks may be needed for a large group).