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Published byRandolf McKenzie Modified over 8 years ago

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Adding and Subtracting Integers

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Vocabulary Negative sign –Left side of number line Positive sign –Right side of number line Operation –Action which produces a new value -3 + -2 second term Negative sign, operation

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Adding Integers Signs are the same –Add –Keep the sign +3 + +3 = +6 -3 + -3 = -6

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Adding Integers Signs are different –Subtract –Take sign of larger number +3 + -4 = -1 -3 + +4 = +1

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Subtracting Integers Subtracting –Instructions SCC First term –Stays the same Operation –Change to opposite Second term –Change the sign +3 - -4 = +3 + +4 = +7 Stay, - operation changes to +, - sign of second term changes to + Now you have an addition problem (check addition rules) –Signs are the same Add Keep sign

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Practice Signs are the same Signs are different Use SCC +4 + +7 = -3 + +6 = +6 - +5 = -5 - +5 =

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