1.	How many tens are in 50?
		A.	6	B.	7
		C.	4	D.	5
		Hint
	2.	How many tens are in 80?
		A.	8	B.	6
		C.	7	D.	9
		Hint
	3.	How many tens are in 19?
		A.	3	B.	2
		C.	4	D.	1
		Hint
	4.	Find 3 − 1.
		A.	3	B.	1
		C.	0	D.	2
		Hint
	5.	Find 8 − 4.
		A.	5	B.	2
		C.	4	D.	3
		Hint