1. Goal: use counters to add integers
Integer Addition
Goal: use counters to add integers

2. Counters
positive ; has a value of 1
negative ; has a value of -1
Zero Pair
has a value of 0

3. Adding Integers Step 1: Represent each integer using counters
Step 2: Remove Zero Pairs (if any)
Step 3: Record value of remaining counters

4. -2 - 5 + 3 = ___ Step 1: represent integers Step 2: remove zero pairs
Step 3: record value of remaining counters -2

5. 5 -2 + 7 = ____ Step 1: represent integers Step 2: remove zero pairs
Step 3: record value of remaining counters 5

6. -5 -2 + -3 = ____ Step 1: represent integers Step 2: remove zero pairs
Step 3: record value of remaining counters -5

7. Practice
= ___ = ___ = ___ = ___ = ___
= ___ = ___ = ___ = ___ = ___