1.	Solve 3x = 18.
		A.	15	B.	7
		C.	6	D.	21
		Hint
	2.	The inequality 18 < 14 is ______.
		A.	true	B.	open
		C.	complete	D.	false
		Hint
	3.	Solve n – 2 = 5.
		A.	–3	B.	3
		C.	–7	D.	7
		Hint
	4.	The number sentence below is false. Make the sentence true by changing one symbol or number. Find the correct number sentence. 52 – 21 = 5 × 4 + 8
		A.	52 – 21 = 5 × 5 + 8
		B.	62 – 21 = 5 × 4 + 8
		C.	52 – 21 < 5 × 4 + 8
		D.	52 – 21 > 5 × 4 + 8
		Hint
	5.	The number sentence below is false. Make the sentence true by changing one symbol or number. Find the correct number sentence. 6 + 14 ÷ 2 = (6 + 12) ? 2 + 3
		A.	6 + 14 ÷ 2 = (6 + 14) ÷ 2 + 3
		B.	6 + 14 ÷ 2 = (6 + 12) ÷ 4 + 3
		C.	6 + 14 ÷ 2 < (6 + 12) ÷ 2 + 3
		D.	6 + 14 ÷ 4 = (6 + 12) ÷ 2 + 3
		Hint