Goal: use counters to add integers

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Integer Addition

• Goal use counters to add integers

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Counters
positive has a value of 1
negative has a value of -1
Zero Pair
has a value of 0
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Adding Integers
Step 1 Represent each integer using counters
Step 2 Remove Zero Pairs (if any)
Step 3 Record value of remaining counters
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- 5 3 ___
Step 1 represent integers
Step 2 remove zero pairs
Step 3 record value of remaining counters
-2
5
-2 7 ____
Step 1 represent integers
Step 2 remove zero pairs
Step 3 record value of remaining counters
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6
-2 -3 ____
Step 1 represent integers
Step 2 remove zero pairs
Step 3 record value of remaining counters
-5
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Practice

• -3 6 ___
• -3 -7 ___
• 8 -2 ___
• -4 2 ___
• -5 -5 ___

• 6 -6 ___
• 3 -4 ___
• -1 -2 ___
• -3 -8 ___
• 5 -7 ___

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