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

@samsungfanboy
@sur

Answer 1

You got the mighty freckles on your post ;)

Answer 2

Haha
@SamsungFanBoy

Answer 3

How about we do a few examples? And you make your own summary from the examples?

example


to compute 5-3 you get 2 (this above picture is a number line showing how to do 5-3)
to compute 3-5 notice 3>5 and you are subtracting a bigger number from a smaller number so to make this easier you can write this as -(5-3) and use the difference above we found to compute 5-3 and then get the result for -(5-3) as -2
now say we have an example of taking a negative from a positive
5-(-3) well this is the same as saying 5+3 since the opposite of a negative is positive
5-(-3)=5+3=8

say you wanted to take away a negative from a negative
-5-(-3) well again-(-3) is still +3
so you have -5+3 which is the same as -(5-3) which is -2