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Adding Integers

Zero Pair 1 + -1 = 0

Why it works… __________ Property says you can add or subtract zero without changing the value of an expression. Identity

-4 + 2

8 + (-7)

4 + 2

-4 + (-2)

3 + -3

For homework, Kyle was adding integers. He looked at a computation and said, “I know the sign of the sum will be negative.” Based on Kyle’s statement, what do you know about the problem?

Annie added three integers and got a sum of zero. What might the three integers have been?

Let’s Think… What is ALWAYS true?

Let’s Think… What rule can we make for adding integers?

2 Most Important Rules to Remember 1.Same sign- Add, keep sign 2.Different sign- Subtract, keep sign of # with greater absolute value

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