Grand Bay Middle School

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How to subtract integers

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Presentation transcript:

Grand Bay Middle School Bellringer #1 7th Grade Math Grand Bay Middle School

Subtracting Integers Same,Change,Change. This means to change the subtract sign to an add sign and to change the 2nd number sign to the opposite.

(-8) - (15) becomes (-8) + (- 15) when using Same, change, change

Practice Problems 17 - (-11) = B 17 + 11 = B 28 = B

X = (- 21) - (-18) X = (-21) + 18 X = - 3

More problems -8- (-22)= 8-22= 22-8= -22-(-8)= 14 -14

17 + ( - 8) - 15 17 +( - 8) + ( - 15) - 6

15 - 20 - 3 -8 -31 - (-8) + 14 -9 - 23 -11 - 4 - 8