
	1.	Round each number to the nearest ten. Estimate the difference.

		A.	30	B.	40
		C.	20	D.	10
		Hint

	2.	Round each number to the nearest ten. Estimate the difference.

		A.	20	B.	40
		C.	10	D.	30
		Hint

	3.	Find 6 − 1.
		A.	4	B.	2
		C.	3	D.	5
		Hint

	4.	Find 5 − 2.
		A.	4	B.	1
		C.	3	D.	2
		Hint

	5.	Find the difference. 8 tens − 5 tens = ___ tens
		A.	3	B.	2
		C.	5	D.	4
		Hint

	6.	Find the difference. 6 tens − 4 tens = ___ tens
		A.	3	B.	2
		C.	1	D.	0
		Hint

	7.	Find the difference. 79 − 50 = ___

		A.	49	B.	29
		C.	39	D.	19
		Hint

	8.	Find the difference. 32 − 20 = ___

		A.	12	B.	10
		C.	22	D.	32
		Hint

	9.	Find the difference. 22 − 2 = ___

		A.	20	B.	24
		C.	19	D.	21
		Hint

	10.	Find the difference. 31 − 4 = ___

		A.	28	B.	30
		C.	25	D.	27
		Hint

	11.	Find the difference.
		A.	64	B.	65
		C.	67	D.	66
		Hint

	12.	Find the difference.
		A.	80	B.	78
		C.	77	D.	79
		Hint

	13.	Find the difference.
		A.	25	B.	28
		C.	27	D.	26
		Hint

	14.	Find the difference.
		A.	26	B.	28
		C.	36	D.	20
		Hint

	15.	Which addition problem checks the subtraction problem?
		A.		B.
		C.		D.
		Hint

	16.	Which addition problem checks the subtraction problem?
		A.		B.
		C.		D.
		Hint