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    5. $+$ and $\times$ on $\reals$

    $+$ and $\times$ on $\reals$

    Example · High school

    Terms

    TermThis exampleWhy
    binary operation ✓ $+$ and $\times$ are binary operations on $\reals$ because they combine two real numbers into a new one: “$2 + 4$” produces $6$.
    relation ✗ $+$ and $\times$ are not relations, because “$2 + 4$” does not have a true or false value.

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    Collection: Examples

    Updated: November 8, 2026

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