25 lines
455 B
Markdown
25 lines
455 B
Markdown
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---
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tags:
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- Mathematics
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- Prealgebra
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- operators
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---
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## Addition, subtraction
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Addition is the inverse of subtraction:
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$$(x - a) + a = x$$
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$$ (6 - 2) + 2 = 6 $$
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Subtraction is the inverse of addition:
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$$(x + a) - a = x$$
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$$ (3 + 2) - 2 = 3$$
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Division is the inverse of multiplication
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$$ \frac{a \cdot x}{a} = x$$
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$$ \frac{6 \cdot 3}{6} = 3$$
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Multiplication is the inverse of division
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$$ a \cdot \frac{x}{a} = x$$
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$$ 2 \cdot \frac{8}{2} = 8$$
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