What is math proptery to multipcation?

Answer 1

Multiplicative identity
a*1 = a

Reciprocality
a * b = 1
then a and b are reciprocals: a = 1/b and b = 1/a

Associativity
a * (b * c) = (a * b) * c

Commutativity
a * b = b * a

Distributivity
a * (b + c) = a*b + a*c