1.	The sum of any number and its additive inverse is _____.
		A.	always 0	B.	always -1
		C.	always positive	D.	always negative
		Hint
	2.	Find the sum -4 + (-7).
		A.	-11	B.	11
		C.	-3	D.	3
		Hint
	3.	Find the sum -10 + 8.
		A.	18	B.	-2
		C.	2	D.	-18
		Hint
	4.	To add integers with different signs, find the difference of their absolute values. Give the result the same sign as ________.
		A.	the integer with the greatest absolute value	B.	the integer with the least absolute value
		C.	the last integer	D.	the first integer
		Hint
	5.	Find the sum -4 + (-1).
		A.	-3	B.	-5
		C.	3	D.	5
		Hint