1. Find the sum. Identify the property.15 + 0 = ___ A. 0; Identity Property of Addition B. 15; Identity Property of Addition C. 15; Associative Property of Addition D. 15; Commutative Property of Addition Hint 2. How can you use the Commutative and Associative Properties of Addition to add 4, 7, and 5? A. The Associative Property tells you to work from left to right, and the Commutative Property of Addition tells you to add. B. The Commutative Property tells you to work from left to right, and the Associative Property of Addition tells you to add. C. It does not matter which two numbers are grouped (Associative Property) or in which order they are added (Commutative Property). D. It does not matter which two numbers are grouped (Commutative Property) or in which order they are added (Associative Property). Hint 3. Find the missing number and identify the property. 8 + __ = 8 A. 0; Commutative Property of Addition B. 8; Identity Property of Addition C. 0; Identity Property of Addition D. 8; Associative Property of Addition Hint 4. Find the missing number and identify the property. (6 + 9) + 4 = (9 + __) + 4 A. 6; Associative Property of Addition B. 9; Commutative Property of Addition C. 6; Commutative Property of Addition D. 6; Identity Property of Addition Hint 5. Find the sum mentally. 9 + 8 + 2 A. 18 B. 10 C. 19 D. 17 Hint