Basic Math Examples

$10$ , $10.5$ , $9.5$ , $10$ , $11$ , $9$ , $13$ , $11$

Step 1

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

$\frac{10 + 10.5 + 9.5 + 10 + 11 + 9 + 13 + 11}{8}$

Step 2

Simplify the numerator.

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Step 2.1

Add $10$ and $10.5$ .

$\frac{20.5 + 9.5 + 10 + 11 + 9 + 13 + 11}{8}$

Step 2.2

Add $20.5$ and $9.5$ .

$\frac{30 + 10 + 11 + 9 + 13 + 11}{8}$

Step 2.3

Add $30$ and $10$ .

$\frac{40 + 11 + 9 + 13 + 11}{8}$

Step 2.4

Add $40$ and $11$ .

$\frac{51 + 9 + 13 + 11}{8}$

Step 2.5

Add $51$ and $9$ .

$\frac{60 + 13 + 11}{8}$

Step 2.6

Add $60$ and $13$ .

$\frac{73 + 11}{8}$

Step 2.7

Add $73$ and $11$ .

$\frac{84}{8}$

Step 3

Cancel the common factor of $84$ and $8$ .

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Step 3.1

Factor $4$ out of $84$ .

$\frac{4 (21)}{8}$

Step 3.2

Cancel the common factors.

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Step 3.2.1

Factor $4$ out of $8$ .

$\frac{4 \cdot 21}{4 \cdot 2}$

Step 3.2.2

Cancel the common factor.

$\frac{4 \cdot 21}{4 \cdot 2}$

Step 3.2.3

Rewrite the expression.

$\frac{21}{2}$

Step 4

Divide.

$10.5$