SOLUTION: (-5) - (3) = -2,how to know if the answer is -2?

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Question 627260: (-5) - (3) = -2,how to know if the answer is -2?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 
Hi,
(-5) - (3) || Note: This says to start at -5 and move back 3 spaces
(-5) - (3) = -8
number_line%28+600%2C+-10%2C+10%2C+-5%2C-8+%29
(-5) - (-3) = -5 + 3 |Note: This would say, start at -5 and move forward 3 spaces
(-5) - (-3) = -2
number_line%28+600%2C+-10%2C+10%2C+-5%2C-2+%29