Pre-Algebra Examples

$- \frac{1}{2} + - \frac{1}{2}$

Step 1

Replace all occurrences of $+$ $-$ with a single $-$ . A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because $1 \cdot - 1 = - 1$

$- \frac{1}{2} - \frac{1}{2}$

Step 2

Combine the numerators over the common denominator.

$\frac{- 1 - 1}{2}$

Step 3

Simplify the expression.

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Step 3.1

Subtract $1$ from $- 1$ .

$\frac{- 2}{2}$

Step 3.2

Divide $- 2$ by $2$ .

$- 1$