Pre-Algebra Examples

$27$ , $13$ , $17$ , $23$ , $20$

Step 1

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

$\frac{27 + 13 + 17 + 23 + 20}{5}$

Step 2

Simplify the numerator.

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Step 2.1

Add $27$ and $13$ .

$\frac{40 + 17 + 23 + 20}{5}$

Step 2.2

Add $40$ and $17$ .

$\frac{57 + 23 + 20}{5}$

Step 2.3

Add $57$ and $23$ .

$\frac{80 + 20}{5}$

Step 2.4

Add $80$ and $20$ .

$\frac{100}{5}$

Step 3

Divide $100$ by $5$ .

$20$