**When we do a problem like 5-2 on a number line, we start up at the 5...**

**and jump back (to the left) 2 places:**

**So, what happens if we want to do this?**

**Start at the 2...**

**and jump back 5...**

**Uh oh! We ran out of numbers!**

**When we do a problem like 5-2 on a number line, we start up at the 5...**

**and jump back (to the left) 2 places:**

**So, what happens if we want to do this?**

**Start at the 2...**

**and jump back 5...**

**Uh oh! We ran out of numbers!**