# Modeling - Easy Subtraction

Trixie was 3 years
and 4 months when this video was made.

**The Problem**

Suppose that you have 5 chickens and that you give 2 of them to me.
How many chickens do you have left?

**What To Look For In This Video**

- Six to eight months ago Trixie was having trouble with Easy Addition and even with Rational Counting. The most notable aspect of this video is the ease with which Trixie makes a model to solve the problem.
- It is probably also worth noting that Trixie has no idea that this "subtraction" problem is any different from the "addition" problems that she has seen in the past. I don't use either word. What's important is that she know how to make a model.
- It is interesting to compare Trixie's work on this Easy Subtraction problem with her work on Hard Subtraction 1 and her work on Hard Subtraction 2. All 3 of these problems were presented to her in one sitting.