Why are so many big cities located along the banks of a river?
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When you add itegers you subtract and take the sign of your highest number if you have two different signs.You just add if their the same.When subtracting integers use cco,copy change opposite and you should have the correct answers.How to use cco - copy your first number in the equation then change you minus sign to an addition sign and your last number should have the opposite sign than what it started with.Use your addition rules now !
