1.	The sum of any number and its additive inverse is _____.
		A.	always -1	B.	always positive
		C.	always 0	D.	always negative
		Hint
	2.	Find the sum -10 + 8.
		A.	-18	B.	2
		C.	18	D.	-2
		Hint
	3.	To add integers with different signs, find the difference of their absolute values. Give the result the same sign as ________.
		A.	the last integer	B.	the first integer
		C.	the integer with the least absolute value	D.	the integer with the greatest absolute value
		Hint
	4.	Find the sum -4 + (-1).
		A.	3	B.	-5
		C.	5	D.	-3
		Hint
	5.	Simplify –10x + (-4x).
		A.	-6x	B.	6x
		C.	-14x	D.	14x
		Hint