Basic Math Examples

$1545$ , $1322$ , $980$ , $1077$ , $1285$ , $972$ , $1482$ , $1168$ , $1149$ , $1205$ , $1173$ , $1257$

Step 1

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

$\frac{1545 + 1322 + 980 + 1077 + 1285 + 972 + 1482 + 1168 + 1149 + 1205 + 1173 + 1257}{12}$

Step 2

Simplify the numerator.

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Step 2.1

Add $1545$ and $1322$ .

$\frac{2867 + 980 + 1077 + 1285 + 972 + 1482 + 1168 + 1149 + 1205 + 1173 + 1257}{12}$

Step 2.2

Add $2867$ and $980$ .

$\frac{3847 + 1077 + 1285 + 972 + 1482 + 1168 + 1149 + 1205 + 1173 + 1257}{12}$

Step 2.3

Add $3847$ and $1077$ .

$\frac{4924 + 1285 + 972 + 1482 + 1168 + 1149 + 1205 + 1173 + 1257}{12}$

Step 2.4

Add $4924$ and $1285$ .

$\frac{6209 + 972 + 1482 + 1168 + 1149 + 1205 + 1173 + 1257}{12}$

Step 2.5

Add $6209$ and $972$ .

$\frac{7181 + 1482 + 1168 + 1149 + 1205 + 1173 + 1257}{12}$

Step 2.6

Add $7181$ and $1482$ .

$\frac{8663 + 1168 + 1149 + 1205 + 1173 + 1257}{12}$

Step 2.7

Add $8663$ and $1168$ .

$\frac{9831 + 1149 + 1205 + 1173 + 1257}{12}$

Step 2.8

Add $9831$ and $1149$ .

$\frac{10980 + 1205 + 1173 + 1257}{12}$

Step 2.9

Add $10980$ and $1205$ .

$\frac{12185 + 1173 + 1257}{12}$

Step 2.10

Add $12185$ and $1173$ .

$\frac{13358 + 1257}{12}$

Step 2.11

Add $13358$ and $1257$ .

$\frac{14615}{12}$

Step 3

Divide.

$1217.91\overline{6}$

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.

$1217.9$