
	1.	Estimate the sum of 65 + 12 using rounding.
		A.	60 + 10 = 70	B.	70 + 20 = 90
		C.	65 + 10 = 75	D.	70 + 10 = 80
		Hint

	2.	Estimate the sum of 61 + 37 using rounding.
		A.	60 + 40 = 100	B.	70 + 30 = 100
		C.	60 + 35 = 95	D.	60 + 30 = 90
		Hint

	3.	Estimate the sum of 44 + 27 using front-end estimation.
		A.	40 + 20 = 60	B.	40 + 30 = 70
		C.	50 + 20 = 70	D.	50 + 30 = 80
		Hint

	4.	Estimate the sum of 36 + 45 using front-end estimation.
		A.	40 + 50 = 90	B.	40 + 40 = 80
		C.	40 + 45 = 85	D.	30 + 40 = 70
		Hint

	5.	How could this problem be rewritten so that an exact answer is needed? Rafael listened to 23 songs today. He listened to 49 yesterday. About how many songs did he listen to in the two days?
		A.	Use multiples of 10 for the numbers.	B.	Remove the word About from the last sentence.
		C.	Use the Commutative Property of Addition.	D.	Use the Identity Property of Addition.
		Hint