Basic Math Examples

$1$ , $321 \div 7$

Step 1

Rewrite the division as a fraction.

$1, \frac{321}{7}$

Step 2

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

$\frac{1 + \frac{321}{7}}{2}$

Step 3

Simplify the numerator.

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Step 3.1

Write $1$ as a fraction with a common denominator.

$\frac{\frac{7}{7} + \frac{321}{7}}{2}$

Step 3.2

Combine the numerators over the common denominator.

$\frac{\frac{7 + 321}{7}}{2}$

Step 3.3

Add $7$ and $321$ .

$\frac{\frac{328}{7}}{2}$

Step 4

Multiply the numerator by the reciprocal of the denominator.

$\frac{328}{7} \cdot \frac{1}{2}$

Step 5

Cancel the common factor of $2$ .

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Step 5.1

Factor $2$ out of $328$ .

$\frac{2 (164)}{7} \cdot \frac{1}{2}$

Step 5.2

Cancel the common factor.

$\frac{2 \cdot 164}{7} \cdot \frac{1}{2}$

Step 5.3

Rewrite the expression.

$\frac{164}{7}$

Step 6

Divide.

$23.42857142$

Step 7

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.

$23.4$