1.	What is the difference 6 - (-6)?
		A.	6	B.	12
		C.	-6	D.	0
		Hint
	2.	Find the difference 25 – 7.
		A.	-32	B.	18
		C.	-18	D.	32
		Hint
	3.	Find the difference -13 – 6.
		A.	7	B.	19
		C.	-19	D.	-7
		Hint
	4.	Evaluate q + r – (-s) if q = 2, r = -1, and s = 4.
		A.	-5	B.	5
		C.	7	D.	-7
		Hint
	5.	Evaluate j – k – l if j = 2, k = 3, and l = 4.
		A.	9	B.	3
		C.	-5	D.	1
		Hint