Pre-Algebra Examples

$1.6$ , $4.8$ , $6.1$ , $7.8$ , $7.8$ , $4.6$ , $2.6$ , $4.6$

Step 1

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

$\frac{1.6 + 4.8 + 6.1 + 7.8 + 7.8 + 4.6 + 2.6 + 4.6}{8}$

Step 2

Simplify the numerator.

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Step 2.1

Add $1.6$ and $4.8$ .

$\frac{6.4 + 6.1 + 7.8 + 7.8 + 4.6 + 2.6 + 4.6}{8}$

Step 2.2

Add $6.4$ and $6.1$ .

$\frac{12.5 + 7.8 + 7.8 + 4.6 + 2.6 + 4.6}{8}$

Step 2.3

Add $12.5$ and $7.8$ .

$\frac{20.3 + 7.8 + 4.6 + 2.6 + 4.6}{8}$

Step 2.4

Add $20.3$ and $7.8$ .

$\frac{28.1 + 4.6 + 2.6 + 4.6}{8}$

Step 2.5

Add $28.1$ and $4.6$ .

$\frac{32.7 + 2.6 + 4.6}{8}$

Step 2.6

Add $32.7$ and $2.6$ .

$\frac{35.3 + 4.6}{8}$

Step 2.7

Add $35.3$ and $4.6$ .

$\frac{39.9}{8}$

Step 3

Divide $39.9$ by $8$ .

$4.9875$

Step 4

The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.

$4.99$