1.	Estimate. Round to the tens place.
		A.	20 + 10 = 30	B.	50 + 20 = 70
		C.	30 + 10 = 40	D.	30 + 20 = 50
		Hint
	2.	Estimate. Round to the tens place.
		A.	$80 − $30 = $50	B.	$70 − $30 = $40
		C.	$100 − $30 = $70	D.	$70 − $40 = $30
		Hint
	3.	Kayla wants to buy a DVD movie that costs $23 and a music CD that costs $18. She has $32. About how much more money does she need to buy the items?
		A.	about $5 more	B.	about $20 more
		C.	about $30 more	D.	about $10 more
		Hint
	4.	Find 84 + 57.
		A.	151	B.	131
		C.	27	D.	141
		Hint
	5.	Find the difference.
		A.	50	B.	33
		C.	34	D.	35
		Hint