Pre-Algebra Examples

$34$ , $17$ , $15$ , $12$ , $32$ , $12$ , $5$ , $12$ , $5$

Step 1

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

$\frac{34 + 17 + 15 + 12 + 32 + 12 + 5 + 12 + 5}{9}$

Step 2

Simplify the numerator.

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Step 2.1

Add $34$ and $17$ .

$\frac{51 + 15 + 12 + 32 + 12 + 5 + 12 + 5}{9}$

Step 2.2

Add $51$ and $15$ .

$\frac{66 + 12 + 32 + 12 + 5 + 12 + 5}{9}$

Step 2.3

Add $66$ and $12$ .

$\frac{78 + 32 + 12 + 5 + 12 + 5}{9}$

Step 2.4

Add $78$ and $32$ .

$\frac{110 + 12 + 5 + 12 + 5}{9}$

Step 2.5

Add $110$ and $12$ .

$\frac{122 + 5 + 12 + 5}{9}$

Step 2.6

Add $122$ and $5$ .

$\frac{127 + 12 + 5}{9}$

Step 2.7

Add $127$ and $12$ .

$\frac{139 + 5}{9}$

Step 2.8

Add $139$ and $5$ .

$\frac{144}{9}$

Step 3

Divide $144$ by $9$ .

$16$