Arithmetic Course/Number Operation/Multiplication

Multiplication

Addition is the operation of adding (combining) two quantities which can be represented by

A x B

Operation

a x b = b x a

a x b x c = a x (b x c) = (a x b) x c

Rules

Any number multiply by zero is equal to zero

a + 0 = a

Any number multiply to itself is

a x a = a²

Any negative number multiply by itself is

(-a) x (-a) = a²

Any number multiply to its negative is

a x (-a) = -a²