Question

Fill in the blanks. Then, choose the property of addition you used.
(a) (3 + 9) + blank = 3 + (9 + 6) choose one:
(b) 3 + blank = 3 choose one:
(c) blank + 8 = 8 + 5 choose one:

Answer 1

next ,
Fill in the blanks. Then, choose the property of addition you used.
(a) (2 + 8) + blank = 2 + (8 + 6) choose one
(b) 6 + 5 = blank + 6

Answer 2

Let's fill in the blanks and then identify the properties of addition used:

(a) (3 + 9) + **6** = 3 + (9 + 6)
**Property used:** Associative Property of Addition

(b) 3 + **0** = 3
**Property used:** Identity Property of Addition

(c) **5** + 8 = 8 + 5
**Property used:** Commutative Property of Addition

So, the completed answers are:
(a) 6, Associative Property of Addition
(b) 0, Identity Property of Addition
(c) 5, Commutative Property of Addition

Answer 3

Let's fill in the blanks and identify the properties of addition used:

(a) (2 + 8) + **6** = 2 + (8 + 6)
**Property used:** Associative Property of Addition

(b) 6 + 5 = **5** + 6
**Property used:** Commutative Property of Addition

So, the completed answers are:
(a) 6, Associative Property of Addition
(b) 5, Commutative Property of Addition