1.	What number is approximately 40% of 685?
		A.	320	B.	420
		C.	350	D.	280
		Hint
	2.	Find 50% of 80 mentally.
		A.	40	B.	4
		C.	20	D.	160
		Hint
	3.	Find 25% of 20 mentally.
		A.	5	B.	4
		C.	80	D.	10
		Hint
	4.	Estimate 60% of 92.
		A.	60	B.	42
		C.	54	D.	48
		Hint
	5.	Estimate 11% of 60.
		A.	600	B.	6
		C.	3	D.	10
		Hint