450 B
450 B
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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 = 3Division is the inverse of multiplication
\frac{a \cdot x}{a} = x \frac{6 \cdot 3}{6} = 3Multiplication is the inverse of division
a \cdot \frac{x}{a} = x 2 \cdot \frac{8}{2} = 8