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Subtracting Integers Big Ideas: Lesson 1.3

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Change the subtraction to addition and change the sign of the next number Instead of Subtracting

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K-Keep the first term F- Flip the subtraction to addition C-Change the sign of second term KFC

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Same sign add and keep Different Sign Subtract Keep the sign of the larger number then youll be exact Change the minus to a plus; Change the sign of the next; All you do is add them up as if they were a plus Row Row Row Your Boat Song

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Adding and Subtracting Integers

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Examples:

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Mondays high temperature was 6 degrees Celsius. The low temperature was 3 degrees Celsius. What was the difference between the high and low temperature? What is the key word that tells you to subtract? Difference Set up your subtraction problem: 6 - (-3) Turn it into an addition problem: 6 + 3 Simplify: 9 degree difference

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https://www.youtube.com/watch?v =FsxXltuUFQM https://www.youtube.com/watch?v =FsxXltuUFQM Video: Subtracting Integers PBS

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Homework Big Ideas: Page 18 (4-32) even