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Published byXavier Donovan Modified over 4 years ago

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**What two numbers will give you a product of 64 and a quotient of 4?**

Warm-Up What two numbers will give you a product of 64 and a quotient of 4?

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Solution 16 and 4 16 x 4 = 64 16 ÷ 4 = 4

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Adding Integers Lesson 3-4

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Adding Integers We can use positive and negative counters to model the addition of integers. Positive Integer Negative Integer A positive integer paired with a negative integer form a zero pair. The value of a zero pair is 0.

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Add -2 + (-4) = -6

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Add 5 + 6 = 11

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Add -3 + (-5) = -8

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Add = -5

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**Adding Integers with like signs. **

Do you notice a pattern or rule? Adding Integers with like signs. - When the signs are the same, add the numbers together and keep the sign.

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= -2 Add Remove all the zero pairs.

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= 3 Add 4 + (-1) Remove all the zero pairs.

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= -1 Add Remove all the zero pairs.

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= -4 Add 3 + (-7) Remove all the zero pairs.

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**Did you notice a pattern or rule?**

Adding integers with unlike signs. - When the signs are different, subtract the integers and keep the sign of the larger digit.

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**Let’s try a few examples using the rules for adding integers.**

-20 -6 12 -2 -38 13 1) = 2) = 3) (-19) = 4) = 5) = 6) (-16) = 7) (-5) =

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**Summary Adding Integers with like signs.**

- When the signs are the same, add the numbers together and keep the sign. = -12 Adding integers with unlike signs. - When the signs are different, subtract the integers and keep the sign of the larger integer. = -6

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Homework: Lesson 3-4 #2-22 evens

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