1.	What number is approximately 40% of 685?
		A.	350	B.	420
		C.	280	D.	320
		Hint
	2.	Find 50% of 80 mentally.
		A.	20	B.	40
		C.	160	D.	4
		Hint
	3.	Find 25% of 20 mentally.
		A.	5	B.	80
		C.	10	D.	4
		Hint
	4.	Estimate 73% of 16.
		A.	12	B.	10
		C.	8	D.	14
		Hint
	5.	Estimate 11% of 60.
		A.	3	B.	10
		C.	6	D.	600
		Hint