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Published byElwin Day Modified over 8 years ago

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Adding Integers The Positive and Negative of it All…

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Get It! Got It! GREAT! What is an Integer? Integers are all the whole numbers greater than zero: 1, 2, 3, 4, 5… and their opposite numbers less than zero: -1,-2,-3,-4,-5… Integer is 17 Opposite is -17 Integer is -8 Integer is 23 Opposite is 8 Opposite is -23

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Integers on a Number Line Negative Integers are opposite whole numbers less than zero: -1,-2,-3,-4,-5… Positive Integers are whole numbers greater than zero: 1,2,3,4, 5…

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How to add positive & positive integers 35+ Positive Integers are whole numbers greater than zero: 1,2,3,4, 5…

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They are BOTH positive Therefore… add numbers And KEEP IT POSITIVE! 35+ 1 2 3 4 5 6 7 8

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-35+ How to add negative & negative integers Negative Integers are opposite whole numbers less than zero: -1,-2,-3,-4,-5…

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They are BOTH negative Therefore… add numbers And KEEP IT NEGATIVE! -3-5+ -2 -3 -4 -5 -6 -7 -8

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How to add negative & positive integers -35+

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Notice how positive and negatives are opposites going two different directions 1

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Notice how positive and negative touch ends or points but don’t point in the same direction. 0 0

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Positive 1/negative -1 cancel out to zero. 0 0 As per number line 1 Positive 1/positive 1 & negative -1/negative -1 follow the same direction and increase 2 or decrease -2. -1+ -1= -2 1+1= 2

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-35+ Adding negative & positive integers

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-35+ 1 5-3=2 5-3=2 5 is bigger and positive so answer must be positive. 2 000 Hint: Subtract both numbers and keep the sign of the bigger whole number.

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Subtracting Integers Adding and subtracting integers is almost identical. We convert the subtraction symbol to addition and give the following number its opposite sign. 5 - 7 Change – to + and opposite of 7 is -7 5 + -7 -2 - 3 = -2 -2 + -3 = -5 Change – to + and opposite of 2 is -2 -2 – -8 -2 + 8 = 6 Change – to + and opposite of -8 is 8

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Copyrighted and created by Susan Blakely

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