Question

Which are these properties of addition?

Answer 1

a=a +0

Answer 2

5 +(-5)=0

Answer 3

Additive Identity Property: The sum of any number and zero is the original number. For example 5 + 0 = 5.

Answer 4

(2+9) +y=2+(9+y)

Answer 5

Associative Property: When three or more numbers are added, the sum is the same regardless of the grouping of the addends. For example (2 + 3) + 4 = 2 + (3 + 4)

(2+9) +y=2+(9+y)