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1.  Signed numbers include all the above .

2.  Zero is a positive number.   False

3.  Distance is a negative value.   False

4.  Positive numbers may or may not be written with a plus sign in front of 
      the number.   True

5.  The absolute value of a positive number is the same as a positive 
      number.   True


6.  The absolute value of a negative number is written as a positive
      number.  True  
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Math: Number Relationships - Lessons  Answer Key