1.	Find the sum.
		A.	13	B.	12
		C.	11	D.	10
		Hint
	2.	Find the difference.
		A.	18	B.	7
		C.	4	D.	8
		Hint
	3.	What is 10 more than 15?
		A.	16	B.	35
		C.	20	D.	25
		Hint
	4.	What is 10 less than 40?
		A.	40	B.	20
		C.	30	D.	10
		Hint