Basic Math Examples

13.5

$13.5$ ,

3.5

$3.5$ ,

5.7

$5.7$ ,

2.9

$2.9$ ,

5.5

$5.5$ ,

2.7

$2.7$ ,

4.7

$4.7$ ,

2.1

$2.1$ ,

4.2

$4.2$ ,

1.8

$1.8$

Step 1

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

\frac{13.5 + 3.5 + 5.7 + 2.9 + 5.5 + 2.7 + 4.7 + 2.1 + 4.2 + 1.8}{10}

$\frac{13.5 + 3.5 + 5.7 + 2.9 + 5.5 + 2.7 + 4.7 + 2.1 + 4.2 + 1.8}{10}$

Step 2

Simplify the numerator.

Tap for more steps...

Step 2.1

Add

13.5

$13.5$ and

3.5

$3.5$ .

\frac{17 + 5.7 + 2.9 + 5.5 + 2.7 + 4.7 + 2.1 + 4.2 + 1.8}{10}

$\frac{17 + 5.7 + 2.9 + 5.5 + 2.7 + 4.7 + 2.1 + 4.2 + 1.8}{10}$

Step 2.2

Add

17

$17$ and

5.7

$5.7$ .

\frac{22.7 + 2.9 + 5.5 + 2.7 + 4.7 + 2.1 + 4.2 + 1.8}{10}

$\frac{22.7 + 2.9 + 5.5 + 2.7 + 4.7 + 2.1 + 4.2 + 1.8}{10}$

Step 2.3

Add

22.7

$22.7$ and

2.9

$2.9$ .

\frac{25.6 + 5.5 + 2.7 + 4.7 + 2.1 + 4.2 + 1.8}{10}

$\frac{25.6 + 5.5 + 2.7 + 4.7 + 2.1 + 4.2 + 1.8}{10}$

Step 2.4

Add

25.6

$25.6$ and

5.5

$5.5$ .

\frac{31.1 + 2.7 + 4.7 + 2.1 + 4.2 + 1.8}{10}

$\frac{31.1 + 2.7 + 4.7 + 2.1 + 4.2 + 1.8}{10}$

Step 2.5

Add

31.1

$31.1$ and

2.7

$2.7$ .

\frac{33.8 + 4.7 + 2.1 + 4.2 + 1.8}{10}

$\frac{33.8 + 4.7 + 2.1 + 4.2 + 1.8}{10}$

Step 2.6

Add

33.8

$33.8$ and

4.7

$4.7$ .

\frac{38.5 + 2.1 + 4.2 + 1.8}{10}

$\frac{38.5 + 2.1 + 4.2 + 1.8}{10}$

Step 2.7

Add

38.5

$38.5$ and

2.1

$2.1$ .

\frac{40.6 + 4.2 + 1.8}{10}

$\frac{40.6 + 4.2 + 1.8}{10}$

Step 2.8

Add

40.6

$40.6$ and

4.2

$4.2$ .

\frac{44.8 + 1.8}{10}

$\frac{44.8 + 1.8}{10}$

Step 2.9

Add

44.8

$44.8$ and

1.8

$1.8$ .

\frac{46.6}{10}

$\frac{46.6}{10}$

\frac{46.6}{10}

$\frac{46.6}{10}$

Step 3

Divide

46.6

$46.6$ by

10

$10$ .

4.66

$4.66$

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.

4.66

$4.66$