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Published byXavier Donovan Modified over 3 years ago

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

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16 and 4 16 x 4 = 64 16 ÷ 4 = 4

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Adding Integers We can use positive and negative counters to model the addition of integers. Positive IntegerNegative 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 -3 + -2= -5

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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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Add -5 + 3 Remove all the zero pairs. = -2

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

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Add -6 + 5 Remove all the zero pairs. = -1

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

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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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Lets try a few examples using the rules for adding integers. 1) -8 + 8 = 2) -9 + -11 = 3) 13 + (-19) = 4) 7 + 5 = 5) -12 + 10 = 6) -22 + (-16) = 7) 18 + (-5) = 0 -20 -6 12 -2 -38 13

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Adding Integers with like signs. - When the signs are the same, add the numbers together and keep the sign. -9 + -3 = -12 Adding integers with unlike signs. - When the signs are different, subtract the integers and keep the sign of the larger integer. -9 + 3 = -6

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Homework: Lesson 3-4 #2-22 evens

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