
	1.	Find the number that completes the number sentence. Then identify the property or rule. (21 + 13) + 56 = 21 + ( __ + 56)
		A.	21; Identity Property of Addition
		B.	13; Commutative Property of Addition
		C.	13; Associative Property of Addition
		D.	35; Subtraction Rule
		Hint

	2.	Find the number that completes the number sentence. Then identify the property or rule. 43 + __ = 43
		A.	43; Commutative Property of Addition
		B.	0; Subtraction Rule
		C.	0; Associative Property of Addition
		D.	0; Identity Property of Addition
		Hint

	3.	Add mentally. 13 + 21 + 17
		A.	60	B.	41
		C.	51	D.	50
		Hint

	4.	Add mentally. 24 + 36 + 34
		A.	94	B.	84
		C.	104	D.	98
		Hint

	5.	When you subtract 0 from any number, the result is the number. Which addition rule is similar?
		A.	Identity Property of Addition	B.	Commutative Property of Addition
		C.	Subtraction Rule	D.	Associative Property of Addition
		Hint