÷division sign (a.k.a. obelus)1659Johann Rahn
×multiplication sign1618William Oughtred
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Plus, minus, division sign, multiplication sign, and equal sign... +,-, /, x, =
Those are the rules of multiplication (and division).
The sign of multiplication is x or *
In multiplication/division the answer will always be negative and in addition/subtract the answerwill have the sign of the larger number