1.	Estimate. Round to the tens place.
		A.	30 + 10 = 40	B.	30 + 20 = 50
		C.	20 + 10 = 30	D.	50 + 20 = 70
		Hint
	2.	Find $45 + $28.
		A.	$73	B.	$83
		C.	$17	D.	$63
		Hint
	3.	Grayson ran 23 miles in his first week of an exercise program. The second week, he ran 28 miles. How many miles did he run altogether?
		A.	41 miles	B.	61 miles
		C.	52 miles	D.	51 miles
		Hint
	4.	Find the difference.
		A.	34	B.	50
		C.	33	D.	35
		Hint
	5.	Find the difference.
		A.	$15	B.	$16
		C.	$14	D.	$33
		Hint