Basic Math Examples

33

$33$ ,

66 - 31

$66 - 31$ ,

9

$9$

Step 1

Subtract

31

$31$ from

66

$66$ .

33, 35, 9

$33, 35, 9$

Step 2

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

\frac{33 + 35 + 9}{3}

$\frac{33 + 35 + 9}{3}$

Step 3

Simplify the numerator.

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Step 3.1

Add

33

$33$ and

35

$35$ .

\frac{68 + 9}{3}

$\frac{68 + 9}{3}$

Step 3.2

Add

68

$68$ and

9

$9$ .

\frac{77}{3}

$\frac{77}{3}$

\frac{77}{3}

$\frac{77}{3}$

Step 4

Divide.

25. ¯ 6

$25.\overline{6}$

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.

25.7

$25.7$