FTCE Professional Education Practice Exam

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According to the identity property, what is the result of adding zero to a number?

The number equals one
The result is zero
The number remains unchanged
The result is the sum of all whole numbers

The correct answer is: The number remains unchanged

Adding zero to a number leverages the identity property of addition, which states that when you add zero to any number, the result is the original number itself. Therefore, the number remains unchanged. This property is fundamental in mathematics, emphasizing that zero acts as the additive identity, meaning it does not alter the value of numbers when added. Other options, although related to the concept of addition, do not accurately reflect what happens when zero is added to a number. For example, saying the result is zero would imply that the original number equates to zero. Stating that the number equals one disregards the identity property entirely and misrepresents the relationship between zero and other numbers. The mention of the sum of all whole numbers introduces a completely different concept, moving away from the simplicity and specificity of the identity property in addition.