Basic Math Examples

$2$ , $- 9$ , $- 2$ , $- 6$ , $- 7$ , $- 1$ , $2$

Step 1

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

$\frac{2 - 9 - 2 - 6 - 7 - 1 + 2}{7}$

Step 2

Simplify the numerator.

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Step 2.1

Subtract $9$ from $2$ .

$\frac{- 7 - 2 - 6 - 7 - 1 + 2}{7}$

Step 2.2

Subtract $2$ from $- 7$ .

$\frac{- 9 - 6 - 7 - 1 + 2}{7}$

Step 2.3

Subtract $6$ from $- 9$ .

$\frac{- 15 - 7 - 1 + 2}{7}$

Step 2.4

Subtract $7$ from $- 15$ .

$\frac{- 22 - 1 + 2}{7}$

Step 2.5

Subtract $1$ from $- 22$ .

$\frac{- 23 + 2}{7}$

Step 2.6

Add $- 23$ and $2$ .

$\frac{- 21}{7}$

Step 3

Divide $- 21$ by $7$ .

$- 3$