Monster Musical Chair Subtraction

Each time a monster is out a chair is taken away. 

Challenge:

See if you can create a number sentence to match each game.

You will start with 20 chairs 

This time the game is the first round 1 chair is taken.

The second round 2 chairs are taken.

Third round 3 chairs are taken.

Fourth round 4 chairs are taken.

Fifth round 5 chairs are taken.

How many chairs are you left with?

Enabling Prompt: Teddies and chairs and act it out. Extending Prompt: If you had 5 rounds starting at 20 chairs and ended with 0 chairs what could this look like?