Basic Math Examples

$0.4$ , $0.5$ , $0.7$ , $0.8$ , $0.8$ , $1.1$ , $0.4$ , $0.9$ , $1.3$

Step 1

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

$\frac{0.4 + 0.5 + 0.7 + 0.8 + 0.8 + 1.1 + 0.4 + 0.9 + 1.3}{9}$

Step 2

Simplify the numerator.

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Step 2.1

Add $0.4$ and $0.5$ .

$\frac{0.9 + 0.7 + 0.8 + 0.8 + 1.1 + 0.4 + 0.9 + 1.3}{9}$

Step 2.2

Add $0.9$ and $0.7$ .

$\frac{1.6 + 0.8 + 0.8 + 1.1 + 0.4 + 0.9 + 1.3}{9}$

Step 2.3

Add $1.6$ and $0.8$ .

$\frac{2.4 + 0.8 + 1.1 + 0.4 + 0.9 + 1.3}{9}$

Step 2.4

Add $2.4$ and $0.8$ .

$\frac{3.2 + 1.1 + 0.4 + 0.9 + 1.3}{9}$

Step 2.5

Add $3.2$ and $1.1$ .

$\frac{4.3 + 0.4 + 0.9 + 1.3}{9}$

Step 2.6

Add $4.3$ and $0.4$ .

$\frac{4.7 + 0.9 + 1.3}{9}$

Step 2.7

Add $4.7$ and $0.9$ .

$\frac{5.6 + 1.3}{9}$

Step 2.8

Add $5.6$ and $1.3$ .

$\frac{6.9}{9}$

Step 3

Divide $6.9$ by $9$ .

$0.7\overline{6}$

Step 4

Divide.

$0.7\overline{6}$

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.

$0.77$