1.	Find 50% of 80 mentally.
		A.	40	B.	4
		C.	20	D.	160
		Hint
	2.	Find 60% of 30 mentally.
		A.	50	B.	24
		C.	18	D.	12
		Hint
	3.	Estimate 73% of 16.
		A.	8	B.	10
		C.	14	D.	12
		Hint
	4.	Estimate 60% of 92.
		A.	54	B.	60
		C.	48	D.	42
		Hint
	5.	Find 75% of 24 mentally.
		A.	32	B.	18
		C.	22	D.	12
		Hint