1.	Based on the factor trees, what is the greatest common factor of 8 and 20?
		A.	4	B.	20
		C.	2	D.	8
		Hint
	2.	What is the greatest common factor of 36 and 45?
		A.	45	B.	3
		C.	36	D.	9
		Hint
	3.	1.Which fraction modeled below rounds to 1 when rounding to the nearest ?
		A.		B.
		C.		D.
		Hint
	4.	What is the greatest common factor of 64 and 40?
		A.	4	B.	2
		C.	20	D.	8
		Hint
	5.	What is the greatest common factor of 39 and 18?
		A.	6	B.	13
		C.	9	D.	3
		Hint
	6.	Use a calculator to find 6 × . Round to the nearest tenth.
		A.	17.9	B.	16.9
		C.	18.8	D.	19.8
		Hint
	7.	Use a calculator to find 3 × × 4. Round to the nearest tenth.
		A.	37.7	B.	38
		C.	37.8	D.	37
		Hint
	8.	Write as an improper fraction.
		A.		B.
		C.		D.
		Hint
	9.	Write as an improper fraction.
		A.		B.
		C.		D.
		Hint
	10.	Which is the best estimate of ?
		A.	2	B.
		C.	0	D.	1
		Hint