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Mathematics 21 Online
OpenStudy (anonymous):

Find the sum: 20 + (-22) = A. -42 B. -2 C. 2 D. 42

OpenStudy (usukidoll):

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OpenStudy (firejay5):

-22 + 20 = -2

OpenStudy (usukidoll):

think finance... your bill is $22 dollars, but you only have 20 dollars. HOw much more do you owe

OpenStudy (usukidoll):

-2... you're 2 dollars in the red.

OpenStudy (usukidoll):

I use that trick all the time whenever I get stuck

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