Finish the following 10 problems on loose-leaf paper to turn in. DO NOT use a calculator unless it is to double check your answer. You MUST prove your answers on a number line or with squares, be careful with the signs.
1) 12 - (-4) 2) 20 - (-5)
3) -12 - (-4) 4) -20 - (-5)
5) 3 - 10 6) 3 - (-10)
7) -8 - 7 8) -8 - (-7)
9) (-5) + (-5) 10) -13 - 7
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