Basic Math Examples

$12$ , $3$ , $- 3$

Step 1

The mean of a set of numbers is the sum divided by the number of terms.

$\frac{12 + 3 - 3}{3}$

Step 2

Cancel the common factor of $12 + 3 - 3$ and $3$ .

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Step 2.1

Factor $3$ out of $12$ .

$\frac{3 \cdot 4 + 3 - 3}{3}$

Step 2.2

Factor $3$ out of $3$ .

$\frac{3 \cdot 4 + 3 \cdot 1 - 3}{3}$

Step 2.3

Factor $3$ out of $3 \cdot 4 + 3 \cdot 1$ .

$\frac{3 \cdot (4 + 1) - 3}{3}$

Step 2.4

Factor $3$ out of $- 3$ .

$\frac{3 \cdot (4 + 1) + 3 \cdot - 1}{3}$

Step 2.5

Factor $3$ out of $3 \cdot (4 + 1) + 3 (- 1)$ .

$\frac{3 \cdot (4 + 1 - 1)}{3}$

Step 2.6

Cancel the common factors.

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Step 2.6.1

Factor $3$ out of $3$ .

$\frac{3 \cdot (4 + 1 - 1)}{3 (1)}$

Step 2.6.2

Cancel the common factor.

$\frac{3 \cdot (4 + 1 - 1)}{3 \cdot 1}$

Step 2.6.3

Rewrite the expression.

$\frac{4 + 1 - 1}{1}$

Step 2.6.4

Divide $4 + 1 - 1$ by $1$ .

$4 + 1 - 1$

Step 3

Simplify by adding and subtracting.

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Step 3.1

Add $4$ and $1$ .

$5 - 1$

Step 3.2

Subtract $1$ from $5$ .

$4$