Introduction
What subtraction strategies can we use in real life?
Goal:
Goal:
This is Kristen and her pet rabbit, Hoppy. Kristen had 8 leaves to feed Hoppy, and Hoppy ate 3 of them.
How many leaves does Kristen have left?
5
Question
We normally count from 1 to 10 like this: 1, 2, 3, and all the way up! This is when we count forward.
What if we start at 10 and then get smaller like this: 9, 8, 7, 6, 5, 4, 3, 2, 1? What is that called?
When we count from big to small, we are counting backward!