Question

If a and b are any two real numbers, explain how you calculate the difference . Be sure to include each of 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

diffference between a and b
a-b

a. addition and subtraction
subtraction is adding, but going backwards in oposite direction

b.  negative, go to left, postive go to right

c. if negative is more than positive, then ending sign is negaitve
if positive is more than negative, then sign is positive