Question

1. If a and b are any two real numbers, explain how you calculate the difference a – b. Be sure to include the following in your explanation:
a. A description of the relationship between addition and subtraction
b. How you can use a number line to help with the calculation
c. How you can determine the sign of the result

Answer 1

http://prntscr.com/4tm490

Answer 2

Oooh, this question is lame. The negative, for a - b, can be rewritten as a + (-b). b. should be obvious, while with c, one will know the sign if:
a>b if a is positive, and b is positive, then its positive
a<b if positive, and b is positive, then its negative...ect.
I don't think you'll have to go that far, though

Answer 3

-.- For Real Dude FOR REAL