# Important Laws and Identities

(e) Commutative Law of Multiplication: a × b = b a

(f) Associative Law of Multiplication: (a × b) c = a × (b × c)

(g) MultiplicativeIdentity–“1”:a×1=a

(h) MultiplicativeInverse:a×(1/a)=1.1/a is the multiplicative inverse of a and vice versa.

(i) Distributivelaw:(a+b)×c=ac+bc

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j) Multiplicativepropertyof“0”:a×0=0

(k) Multiplicative property of “–1”: (–1) × a = –a

(l) a×1/b=a/b,whereb0.