Basic Math Examples

$83$ , $86$ , $92$ , $13$ , $28$ , $53$ , $49$ , $28$ , $49$ , $66$ , $50$ , $81$ , $18$ , $27$ , $68$ , $81$ , $45$ , $53$ , $21$ , $17$ , $55$ , $80$

Step 1

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

$\frac{83 + 86 + 92 + 13 + 28 + 53 + 49 + 28 + 49 + 66 + 50 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2

Simplify the numerator.

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Step 2.1

Add $83$ and $86$ .

$\frac{169 + 92 + 13 + 28 + 53 + 49 + 28 + 49 + 66 + 50 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.2

Add $169$ and $92$ .

$\frac{261 + 13 + 28 + 53 + 49 + 28 + 49 + 66 + 50 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.3

Add $261$ and $13$ .

$\frac{274 + 28 + 53 + 49 + 28 + 49 + 66 + 50 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.4

Add $274$ and $28$ .

$\frac{302 + 53 + 49 + 28 + 49 + 66 + 50 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.5

Add $302$ and $53$ .

$\frac{355 + 49 + 28 + 49 + 66 + 50 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.6

Add $355$ and $49$ .

$\frac{404 + 28 + 49 + 66 + 50 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.7

Add $404$ and $28$ .

$\frac{432 + 49 + 66 + 50 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.8

Add $432$ and $49$ .

$\frac{481 + 66 + 50 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.9

Add $481$ and $66$ .

$\frac{547 + 50 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.10

Add $547$ and $50$ .

$\frac{597 + 81 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.11

Add $597$ and $81$ .

$\frac{678 + 18 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.12

Add $678$ and $18$ .

$\frac{696 + 27 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.13

Add $696$ and $27$ .

$\frac{723 + 68 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.14

Add $723$ and $68$ .

$\frac{791 + 81 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.15

Add $791$ and $81$ .

$\frac{872 + 45 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.16

Add $872$ and $45$ .

$\frac{917 + 53 + 21 + 17 + 55 + 80}{22}$

Step 2.17

Add $917$ and $53$ .

$\frac{970 + 21 + 17 + 55 + 80}{22}$

Step 2.18

Add $970$ and $21$ .

$\frac{991 + 17 + 55 + 80}{22}$

Step 2.19

Add $991$ and $17$ .

$\frac{1008 + 55 + 80}{22}$

Step 2.20

Add $1008$ and $55$ .

$\frac{1063 + 80}{22}$

Step 2.21

Add $1063$ and $80$ .

$\frac{1143}{22}$

Step 3

Divide.

$51.9\overline{54}$

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.

$52$