Question

Which of the following represents the additive identity?

1. ab = ab
2. a x 1 = a
3. a+b = b+a
4. a + 0 = a

Answer 1

a + b = a

Explanation:

Additive identity- the number 0; when added to any number, the value of the number does not change.

Answer 2

4. a + 0 = a

Explanation:

The zero means that it is the additive property.