1.   Find the sum. Identify the property.

(2 + 9) + 4 = ___

2 + (9 + 4) = ___
    A. 13; Commutative Property of Addition B. 15; Identity Property of Addition
    C. 15; Associative Property of Addition D. 11; Commutative Property of Addition
    Hint
  2.   Find the sum. Identify the property.

4 + 7 = ___

7 + 4 = ___
    A. 7; Identity Property of Addition B. 11; Identity Property of Addition
    C. 11; Commutative Property of Addition D. 11; Associative Property of Addition
    Hint
  3.   How can you use the Commutative and Associative Properties of Addition to add 4, 7, and 5?
    A. The Commutative Property tells you to work from left to right, and the Associative Property of Addition tells you to add. B. It does not matter which two numbers are added first (Commutative Property) or in which order they are added (Associative Property).
    C. It does not matter which two numbers are added first (Associative Property) or in which order they are added (Commutative Property). D. The Associative Property tells you to work from left to right, and the Commutative Property of Addition tells you to add.
    Hint
  4.   Find the sum mentally.

5 + 9 + 5
    A. 15 B. 14
    C. 21 D. 19
    Hint
  5.   Find the sum mentally.

5 + 7 + 1 + 3
    A. 16 B. 20
    C. 10 D. 15
    Hint