Subtracting zero from a whole number leaves the quantity unchanged: , including , because removing nothing does not alter the amount. Quantities, place-value representations, and number lines can show that no units, tens, or hundreds are removed and no movement occurs; this understanding applies to whole numbers through 1,000 and does not include later extensions to negative numbers, fractions, or abstract algebraic systems.
Subtracting zero means taking away nothing. The number stays the same.
Example:
Therefore,
The same idea works for any whole number, including .
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