1.	An example of the Commutative Property of Addition is ______________.
		A.	2 · 4 = 4 · 2
		B.	2(4 · 6) = (2 · 4)6
		C.	2 + (4 + 6) = (2 + 4) + 6
		D.	2 + 4 = 4 + 2
		Hint
	2.	Simplify 6 + b + 3.
		A.	b + 9	B.	3 + b
		C.	9	D.	9b
		Hint
	3.	Simplify 5 · x · 10.
		A.	50x	B.	15x
		C.	15 + x	D.	50 + x
		Hint
	4.	Find 50 · (13 · 2) mentally.
		A.	130	B.	1200
		C.	1300	D.	750
		Hint
	5.	Simplify (r + 6) + 27.
		A.	r + 33	B.	6r + 27
		C.	r + 21	D.	33r
		Hint