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Subtraction
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===Real numbers=== The [[Field (mathematics)|field]] of real numbers can be defined specifying only two binary operations, addition and multiplication, together with [[unary operations]] yielding [[Additive inverse|additive]] and [[Multiplicative inverse|multiplicative]] inverses. The subtraction of a real number (the subtrahend) from another (the minuend) can then be defined as the addition of the minuend and the additive inverse of the subtrahend. For example, {{math|1=3 β ''Ο'' = 3 + (β''Ο'')}}. Alternatively, instead of requiring these unary operations, the binary operations of subtraction and [[Division (mathematics)|division]] can be taken as basic.
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