1.	Solve x + 4 = 7.
		A.	11	B.	–11
		C.	3	D.	–3
		Hint
	2.	Solve z + 6 = 3.
		A.	–3	B.	–9
		C.	3	D.	9
		Hint
	3.	Solve a + 6 = –2.
		A.	–8	B.	4
		C.	–4	D.	8
		Hint
	4.	Decide which addition equation the model represents. Then solve the equation.
		A.	x + 1 = 5; x = 6
		B.	x + 1 = 5; x = 4
		C.	x + 5 = 1; x = –4
		D.	x + 5 = 1; x = 6
		Hint
	5.	Solve b + 1 = –3.
		A.	2	B.	–2
		C.	–4	D.	4
		Hint