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Cornell Notes in Math – IN pg 31 Class Notes Name: If there was no class lecture this week, write a paragraph Class: Pre- algebra about what you learned and/or questions about what you didn’t Period: 2/5 understand Reference: Pg 23-28 Date: 9/27/10 Questions/Main Ideas: Notes: Adding Integers Rules for adding integers Same sign add the numbers and use the sign ex. -3+(-5)=-8 3+5=8 (- - - ) (+ + + ) + (-----) + (+ + + + +) Different signs1. subtract the two numbers 2. use the sign of the one with the greatest absolute value. ex. -3 + 5 = 2 3 + (-5) = -2 - - + + + + + +++ - - - - Additive inverse – to add opposites together to create a sum of zero | | | | | | | -3 -2 -1 0 1 2 3 -3 + 3 = 0 - - + + + a neutral field –value =0 Summary: When adding integers, if the signs are the same, the sign of the _______ will be the same. If the signs are different, the sign of the sum will be the same as the sign of the integer with the greatest _________________ _______. When you add opposites, it is called the ____________ ___________. The sum will always equal ______.