Basic Math Examples

$81$ , $83$ , $69$ , $71$ , $74$ , $67$ , $85$ , $74$ , $73$ , $68$ , $73$ , $78$ , $80$ , $89$ , $75$

Step 1

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

$\frac{81 + 83 + 69 + 71 + 74 + 67 + 85 + 74 + 73 + 68 + 73 + 78 + 80 + 89 + 75}{15}$

Step 2

Simplify the numerator.

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Step 2.1

Add $81$ and $83$ .

$\frac{164 + 69 + 71 + 74 + 67 + 85 + 74 + 73 + 68 + 73 + 78 + 80 + 89 + 75}{15}$

Step 2.2

Add $164$ and $69$ .

$\frac{233 + 71 + 74 + 67 + 85 + 74 + 73 + 68 + 73 + 78 + 80 + 89 + 75}{15}$

Step 2.3

Add $233$ and $71$ .

$\frac{304 + 74 + 67 + 85 + 74 + 73 + 68 + 73 + 78 + 80 + 89 + 75}{15}$

Step 2.4

Add $304$ and $74$ .

$\frac{378 + 67 + 85 + 74 + 73 + 68 + 73 + 78 + 80 + 89 + 75}{15}$

Step 2.5

Add $378$ and $67$ .

$\frac{445 + 85 + 74 + 73 + 68 + 73 + 78 + 80 + 89 + 75}{15}$

Step 2.6

Add $445$ and $85$ .

$\frac{530 + 74 + 73 + 68 + 73 + 78 + 80 + 89 + 75}{15}$

Step 2.7

Add $530$ and $74$ .

$\frac{604 + 73 + 68 + 73 + 78 + 80 + 89 + 75}{15}$

Step 2.8

Add $604$ and $73$ .

$\frac{677 + 68 + 73 + 78 + 80 + 89 + 75}{15}$

Step 2.9

Add $677$ and $68$ .

$\frac{745 + 73 + 78 + 80 + 89 + 75}{15}$

Step 2.10

Add $745$ and $73$ .

$\frac{818 + 78 + 80 + 89 + 75}{15}$

Step 2.11

Add $818$ and $78$ .

$\frac{896 + 80 + 89 + 75}{15}$

Step 2.12

Add $896$ and $80$ .

$\frac{976 + 89 + 75}{15}$

Step 2.13

Add $976$ and $89$ .

$\frac{1065 + 75}{15}$

Step 2.14

Add $1065$ and $75$ .

$\frac{1140}{15}$

Step 3

Divide $1140$ by $15$ .

$76$