Final answer:
The additive identity for integers and rational numbers is 0.
Explanation:
The additive identity for all integers and rational numbers is the number 0. This means that when any integer or rational number is added to 0, it remains unchanged.
For example, 5 + 0 = 5 and 2/3 + 0 = 2/3.
Understanding the concept of additive identity is fundamental in arithmetic and algebraic operations.
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