1.	Solve h + 2 = 5 mentally.
		A.	h = 7	B.	h = 2
		C.	h = 5	D.	h = 3
		Hint
	2.	Solve n − 12 = 12 mentally.
		A.	n = 12	B.	n = 18
		C.	n = 0	D.	n = 24
		Hint
	3.	Solve 18 − d = 5 mentally.
		A.	d = 8	B.	d = 13
		C.	d = 5	D.	d = 23
		Hint
	4.	Solve n - 15 = 15 mentally.
		A.	n = 0	B.	n = 30
		C.	n = 15	D.	n = 45
		Hint
	5.	If m − 4 = 11, what is the value of m?
		A.	19	B.	4
		C.	11	D.	15
		Hint