DIY: Math facts dice game

A very simple dice game to practice basic [addition or multiplication] facts. It is more fun than flash cards!

All you need is two blank 12-sided dice. On each one write numbers from 0 to 11.
If you want to add more action - add another die. I used a regular 6 sided die and wrote (+), (-), (x).

When you roll all three dice you get two numbers and an action. Solve the equation. Note that for subtraction, you always subtract the smaller number from the bigger one.