Basic Math Examples

$4.5$ , $5.7$ , $4.3$ , $6.9$ , $- 2.1$ , $5.7$ , $- 1.2$ , $3.8$

Step 1

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

$\frac{4.5 + 5.7 + 4.3 + 6.9 - 2.1 + 5.7 - 1.2 + 3.8}{8}$

Step 2

Simplify the numerator.

Tap for more steps...

Step 2.1

Add $4.5$ and $5.7$ .

$\frac{10.2 + 4.3 + 6.9 - 2.1 + 5.7 - 1.2 + 3.8}{8}$

Step 2.2

Add $10.2$ and $4.3$ .

$\frac{14.5 + 6.9 - 2.1 + 5.7 - 1.2 + 3.8}{8}$

Step 2.3

Add $14.5$ and $6.9$ .

$\frac{21.4 - 2.1 + 5.7 - 1.2 + 3.8}{8}$

Step 2.4

Subtract $2.1$ from $21.4$ .

$\frac{19.3 + 5.7 - 1.2 + 3.8}{8}$

Step 2.5

Add $19.3$ and $5.7$ .

$\frac{25 - 1.2 + 3.8}{8}$

Step 2.6

Subtract $1.2$ from $25$ .

$\frac{23.8 + 3.8}{8}$

Step 2.7

Add $23.8$ and $3.8$ .

$\frac{27.6}{8}$

Step 3

Divide $27.6$ by $8$ .

$3.45$

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.

$3.45$