1.	Estimate the sum using rounding.
		A.	50 + 30 = 80	B.	40 + 30 = 70
		C.	50 + 20 = 70	D.	40 + 40 = 80
		Hint
	2.	Estimate the sum using rounding.
		A.	70 + 20 = 90	B.	60 + 10 = 70
		C.	65 + 10 = 75	D.	70 + 10 = 80
		Hint
	3.	Estimate the sum using rounding.
		A.	60 + 35 = 95	B.	60 + 30 = 90
		C.	70 + 30 = 100	D.	60 + 40 = 100
		Hint
	4.	Suki read 78 pages in her book last week. This week she read 31 pages so far. About how many pages did she read over the last two weeks?
		A.	70 + 30 = 100	B.	80 + 40 = 120
		C.	100 + 30 = 130	D.	80 + 30 = 110
		Hint
	5.	Estimate the sum 49 + 27 using compatible numbers.
		A.	50 + 20 = 70	B.	50 + 10 = 60
		C.	50 + 25 = 75	D.	40 + 20 = 60
		Hint