1.	Round 37.507 to the nearest whole number.
		A.	37	B.	37.51
		C.	38	D.	37.5
		Hint
	2.	What is rounded to the nearest half unit?
		A.		B.	1
		C.		D.
		Hint
	3.	Use rounding to estimate 12 + 7
		A.	18	B.	20
		C.	19	D.	21
		Hint
	4.	Estimate the difference 5.6 - 7.3.
		A.	-1	B.	-2
		C.	1	D.	2
		Hint
	5.	Estimate the sum 42 + 156 + 191 + 212.
		A.	590	B.	600
		C.	610	D.	620
		Hint