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.

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.

mathmale · Answer

Questions for you:  How are addition and subtraction related to one another?

Values a and b could be graphed on a number line.  Just draw a horizontal line and mark the origin with zero.  Supposing that b is greater than a, please locate values a and b on the number line.  How far apart are a and b?  What does this distance represent?

scarlettfarra2000 · Answer

Thanks