1.	Use doubles to add.
		4 + 4 =
		A.	7	B.	5
		C.	8	D.	6
		Hint
	2.	Use doubles to add.
		5 + 5 =
		A.	8	B.	9
		C.	10	D.	7
		Hint
	3.	Use doubles to subtract.
		10 − 5 =
		A.	4	B.	5
		C.	2	D.	6
		Hint
	4.	Use doubles to subtract.
		12 − 6 =
		A.	7	B.	6
		C.	8	D.	5
		Hint