Pre-Algebra Examples

$21$ , $25$ , $28$ , $34$ , $37$ , $39$ , $43$ , $44$ , $44$ , $44$ , $47$ , $51$ , $51$ , $53$ , $53$ , $54$ , $54$ , $55$ , $56$ , $62$ , $64$ , $65$ , $68$ , $72$ , $76$ , $86$

Step 1

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

$\frac{21 + 25 + 28 + 34 + 37 + 39 + 43 + 44 + 44 + 44 + 47 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2

Simplify the numerator.

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Step 2.1

Add $21$ and $25$ .

$\frac{46 + 28 + 34 + 37 + 39 + 43 + 44 + 44 + 44 + 47 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.2

Add $46$ and $28$ .

$\frac{74 + 34 + 37 + 39 + 43 + 44 + 44 + 44 + 47 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.3

Add $74$ and $34$ .

$\frac{108 + 37 + 39 + 43 + 44 + 44 + 44 + 47 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.4

Add $108$ and $37$ .

$\frac{145 + 39 + 43 + 44 + 44 + 44 + 47 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.5

Add $145$ and $39$ .

$\frac{184 + 43 + 44 + 44 + 44 + 47 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.6

Add $184$ and $43$ .

$\frac{227 + 44 + 44 + 44 + 47 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.7

Add $227$ and $44$ .

$\frac{271 + 44 + 44 + 47 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.8

Add $271$ and $44$ .

$\frac{315 + 44 + 47 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.9

Add $315$ and $44$ .

$\frac{359 + 47 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.10

Add $359$ and $47$ .

$\frac{406 + 51 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.11

Add $406$ and $51$ .

$\frac{457 + 51 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.12

Add $457$ and $51$ .

$\frac{508 + 53 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.13

Add $508$ and $53$ .

$\frac{561 + 53 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.14

Add $561$ and $53$ .

$\frac{614 + 54 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.15

Add $614$ and $54$ .

$\frac{668 + 54 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.16

Add $668$ and $54$ .

$\frac{722 + 55 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.17

Add $722$ and $55$ .

$\frac{777 + 56 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.18

Add $777$ and $56$ .

$\frac{833 + 62 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.19

Add $833$ and $62$ .

$\frac{895 + 64 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.20

Add $895$ and $64$ .

$\frac{959 + 65 + 68 + 72 + 76 + 86}{26}$

Step 2.21

Add $959$ and $65$ .

$\frac{1024 + 68 + 72 + 76 + 86}{26}$

Step 2.22

Add $1024$ and $68$ .

$\frac{1092 + 72 + 76 + 86}{26}$

Step 2.23

Add $1092$ and $72$ .

$\frac{1164 + 76 + 86}{26}$

Step 2.24

Add $1164$ and $76$ .

$\frac{1240 + 86}{26}$

Step 2.25

Add $1240$ and $86$ .

$\frac{1326}{26}$

Step 3

Divide $1326$ by $26$ .

$51$