Evaluate ((-2+1)/2)((7.5+3)/2)

$(\frac{- 2 + 1}{2}) (\frac{7.5 + 3}{2})$

Add $- 2$ and $1$ .

$\frac{- 1}{2} \cdot \frac{7.5 + 3}{2}$

Add $7.5$ and $3$ .

$\frac{- 1}{2} \cdot \frac{10.5}{2}$

Move the negative in front of the fraction.

$- \frac{1}{2} \cdot \frac{10.5}{2}$

Divide $10.5$ by $2$ .

$- \frac{1}{2} \cdot 5.25$

Multiply $- \frac{1}{2} \cdot 5.25$ .

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Multiply $5.25$ by $- 1$ .

$- 5.25 (\frac{1}{2})$

Combine $- 5.25$ and $\frac{1}{2}$ .

$\frac{- 5.25}{2}$

Divide $- 5.25$ by $2$ .

$- 2.625$

Evaluate ((-2+1)/2)((7.5+3)/2)

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