Basic Math Examples

$A = \frac{1}{2} \cdot 15 - 5$

Step 1

Combine $\frac{1}{2}$ and $15$ .

$A = \frac{15}{2} - 5$

Step 2

To write $- 5$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$A = \frac{15}{2} - 5 \cdot \frac{2}{2}$

Step 3

Combine $- 5$ and $\frac{2}{2}$ .

$A = \frac{15}{2} + \frac{- 5 \cdot 2}{2}$

Step 4

Combine the numerators over the common denominator.

$A = \frac{15 - 5 \cdot 2}{2}$

Step 5

Simplify the numerator.

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Step 5.1

Multiply $- 5$ by $2$ .

$A = \frac{15 - 10}{2}$

Step 5.2

Subtract $10$ from $15$ .

$A = \frac{5}{2}$

Step 6

The result can be shown in multiple forms.

Exact Form:

$A = \frac{5}{2}$

Decimal Form:

$A = 2.5$

Mixed Number Form:

$A = 2 \frac{1}{2}$