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Mathematics 18 Online
OpenStudy (gabby2117):

I have a big and really important test coming up and I still have a lot of trouble understanding adding and subtracting negatives. Can someone please explain it. Also I will give you a medal if you answer,but you will have to tell me how, I'm new.

OpenStudy (anonymous):

What exactly you need help with?

OpenStudy (welshfella):

the thermometer analogy should help you |dw:1447170898251:dw|

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