Additive associative law: (a+b)+c=a+(b+c)

Multiplicative commutative law: a×b=b×a

Law of multiplicative association: (a×b)×c=a×(b÷c)

Decreasing property: a-b-c = a-(b+c)

Nature of division: a÷b÷c=a÷(b×c)

Quotient invariance: a÷b=(a×m)÷(b×m)=(a÷m)÷(b÷m) m≠0.