Basic Math Examples

5.5

$5.5$ ,

7.6

$7.6$ ,

3.7

$3.7$ ,

2.4

$2.4$ ,

8.9

$8.9$ ,

4.9

$4.9$ ,

5.2

$5.2$ ,

7.8

$7.8$ ,

3.4

$3.4$ ,

1.9

$1.9$ ,

5.9

$5.9$

Step 1

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

\frac{5.5 + 7.6 + 3.7 + 2.4 + 8.9 + 4.9 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}

$\frac{5.5 + 7.6 + 3.7 + 2.4 + 8.9 + 4.9 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}$

Step 2

Simplify the numerator.

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Step 2.1

Add

5.5

$5.5$ and

7.6

$7.6$ .

\frac{13.1 + 3.7 + 2.4 + 8.9 + 4.9 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}

$\frac{13.1 + 3.7 + 2.4 + 8.9 + 4.9 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}$

Step 2.2

Add

13.1

$13.1$ and

3.7

$3.7$ .

\frac{16.8 + 2.4 + 8.9 + 4.9 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}

$\frac{16.8 + 2.4 + 8.9 + 4.9 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}$

Step 2.3

Add

16.8

$16.8$ and

2.4

$2.4$ .

\frac{19.2 + 8.9 + 4.9 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}

$\frac{19.2 + 8.9 + 4.9 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}$

Step 2.4

Add

19.2

$19.2$ and

8.9

$8.9$ .

\frac{28.1 + 4.9 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}

$\frac{28.1 + 4.9 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}$

Step 2.5

Add

28.1

$28.1$ and

4.9

$4.9$ .

\frac{33 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}

$\frac{33 + 5.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}$

Step 2.6

Add

33

$33$ and

5.2

$5.2$ .

\frac{38.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}

$\frac{38.2 + 7.8 + 3.4 + 1.9 + 5.9}{11}$

Step 2.7

Add

38.2

$38.2$ and

7.8

$7.8$ .

\frac{46 + 3.4 + 1.9 + 5.9}{11}

$\frac{46 + 3.4 + 1.9 + 5.9}{11}$

Step 2.8

Add

46

$46$ and

3.4

$3.4$ .

\frac{49.4 + 1.9 + 5.9}{11}

$\frac{49.4 + 1.9 + 5.9}{11}$

Step 2.9

Add

49.4

$49.4$ and

1.9

$1.9$ .

\frac{51.3 + 5.9}{11}

$\frac{51.3 + 5.9}{11}$

Step 2.10

Add

51.3

$51.3$ and

5.9

$5.9$ .

\frac{57.2}{11}

$\frac{57.2}{11}$

\frac{57.2}{11}

$\frac{57.2}{11}$

Step 3

Divide

57.2

$57.2$ by

11

$11$ .

5.2

$5.2$

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.

5.2

$5.2$