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OpenStudy (anonymous):
At oscars school, 3 over 10 of the 5th grade stdent bring their lunch an 7 over 10 buy their lunch in the cafetiria> is that addition or subtraction?
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OpenStudy (anonymous):
We haven't performed any action, so how can that be either addition or subtraction? Bring lunch from home: 3/10 or 0.3 Buy lunch from cafeteria: 7/10 or 0.7 ??
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