Basic Math Examples

$0.2$ ,

$0.3$ ,

$0.9$ ,

$0.8$ ,

$0.9$ ,

$0.8$ ,

$0.4$ ,

$0.9$

Step 1

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

$\frac{0.2 + 0.3 + 0.9 + 0.8 + 0.9 + 0.8 + 0.8 + 0.4 + 0.9}{9}$

Step 2

Simplify the numerator.

Tap for more steps...

Step 2.1

Add

$0.2$ and

$0.3$ .

$\frac{0.5 + 0.9 + 0.8 + 0.9 + 0.8 + 0.8 + 0.4 + 0.9}{9}$

Step 2.2

Add

$0.5$ and

$0.9$ .

$\frac{1.4 + 0.8 + 0.9 + 0.8 + 0.8 + 0.4 + 0.9}{9}$

Step 2.3

Add

$1.4$ and

$0.8$ .

$\frac{2.2 + 0.9 + 0.8 + 0.8 + 0.4 + 0.9}{9}$

Step 2.4

Add

$2.2$ and

$0.9$ .

$\frac{3.1 + 0.8 + 0.8 + 0.4 + 0.9}{9}$

Step 2.5

Add

$3.1$ and

$0.8$ .

$\frac{3.9 + 0.8 + 0.4 + 0.9}{9}$

Step 2.6

Add

$3.9$ and

$0.8$ .

$\frac{4.7 + 0.4 + 0.9}{9}$

Step 2.7

Add

$4.7$ and

$0.4$ .

$\frac{5.1 + 0.9}{9}$

Step 2.8

Add

$5.1$ and

$0.9$ .

$\frac{6}{9}$

Step 3

Cancel the common factor of

$6$ and

$9$ .

Tap for more steps...

Step 3.1

Factor

$3$ out of

$6$ .

$\frac{3 (2)}{9}$

Step 3.2

Cancel the common factors.

Tap for more steps...

Step 3.2.1

Factor

$3$ out of

$9$ .

$\frac{3 \cdot 2}{3 \cdot 3}$

Step 3.2.2

Cancel the common factor.

$\frac{3 \cdot 2}{3 \cdot 3}$

Step 3.2.3

Rewrite the expression.

$\frac{2}{3}$

Step 4

Divide.

$0.\overline{6}$

Step 5

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.

$0.67$