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OpenStudy (anonymous):
Chris’s hike started at an elevation of –12 m. His hike finished at an elevation of 235 m. How much did Chris’s elevation change?
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OpenStudy (igreen):
Just add.. 235 + -12 = 223. So Chris's elevation changed by 223m.
OpenStudy (texaschic101):
I am not sure about that....when you add 12 to -12, it equals 0, then there is 235...so wouldn't it be 235 + 12 = 247m
OpenStudy (texaschic101):
@iGreen
OpenStudy (igreen):
Well if he starts at -12..it takes 12m just to get to zero and on top of that you have 235..so yeah I think you're right..
OpenStudy (texaschic101):
I wasn't sure there for a second...but confirmation is always good
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OpenStudy (perl):
235 - (-12) = 235 + 12
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