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Question

What is the additive identity of the integer z?

A
-z
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B
0.0
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C
1
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D
z
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Solution

The correct option is B 0.0
In general, for any integer a,
a + 0 = a = 0 + a.
Zero is an additive identity for integers.
3 + 0 = 3,
z + 0 = z.

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