IDNLearn.com provides a collaborative platform for sharing and gaining knowledge. Ask your questions and get detailed, reliable answers from our community of knowledgeable experts.

PLEASE HELP
Fill in the blanks. Then, choose the property of addition you used.
(a)3+_= 3
(Choose one)
(b)4 + 7) + _1 = 4 + (7 + 3)
(Choose one)
(c)9+8 = 8+_
(Choose one)

Fill in the blank and choose a property