Inversion of operators

Addition, subtraction

Addition is the inverse of subtraction: (x - a) + a = x (6 - 2) + 2 = 6

Subtraction is the inverse of addition: (x + a) - a = x (3 + 2) - 2 = 3

Division is the inverse of multiplication \frac{a \cdot x}{a} = x \frac{6 \cdot 3}{6} = 3

Multiplication is the inverse of division a \cdot \frac{x}{a} = x

2 \cdot \frac{8}{2} = 8