Basic Math Examples

98

$98$ ,

87

$87$ ,

92

$92$ ,

79

$79$ ,

65

$65$ ,

91

$91$ ,

80

$80$ ,

92

$92$ ,

85

$85$ ,

86

$86$

Step 1

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

\frac{98 + 87 + 92 + 79 + 65 + 91 + 80 + 92 + 85 + 86}{10}

$\frac{98 + 87 + 92 + 79 + 65 + 91 + 80 + 92 + 85 + 86}{10}$

Step 2

Simplify the numerator.

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Step 2.1

Add

98

$98$ and

87

$87$ .

\frac{185 + 92 + 79 + 65 + 91 + 80 + 92 + 85 + 86}{10}

$\frac{185 + 92 + 79 + 65 + 91 + 80 + 92 + 85 + 86}{10}$

Step 2.2

Add

185

$185$ and

92

$92$ .

\frac{277 + 79 + 65 + 91 + 80 + 92 + 85 + 86}{10}

$\frac{277 + 79 + 65 + 91 + 80 + 92 + 85 + 86}{10}$

Step 2.3

Add

277

$277$ and

79

$79$ .

\frac{356 + 65 + 91 + 80 + 92 + 85 + 86}{10}

$\frac{356 + 65 + 91 + 80 + 92 + 85 + 86}{10}$

Step 2.4

Add

356

$356$ and

65

$65$ .

\frac{421 + 91 + 80 + 92 + 85 + 86}{10}

$\frac{421 + 91 + 80 + 92 + 85 + 86}{10}$

Step 2.5

Add

421

$421$ and

91

$91$ .

\frac{512 + 80 + 92 + 85 + 86}{10}

$\frac{512 + 80 + 92 + 85 + 86}{10}$

Step 2.6

Add

512

$512$ and

80

$80$ .

\frac{592 + 92 + 85 + 86}{10}

$\frac{592 + 92 + 85 + 86}{10}$

Step 2.7

Add

592

$592$ and

92

$92$ .

\frac{684 + 85 + 86}{10}

$\frac{684 + 85 + 86}{10}$

Step 2.8

Add

684

$684$ and

85

$85$ .

\frac{769 + 86}{10}

$\frac{769 + 86}{10}$

Step 2.9

Add

769

$769$ and

86

$86$ .

\frac{855}{10}

$\frac{855}{10}$

\frac{855}{10}

$\frac{855}{10}$

Step 3

Cancel the common factor of

855

$855$ and

10

$10$ .

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Step 3.1

Factor

5

$5$ out of

855

$855$ .

\frac{5 (171)}{10}

$\frac{5 (171)}{10}$

Step 3.2

Cancel the common factors.

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Step 3.2.1

Factor

5

$5$ out of

10

$10$ .

\frac{5 \cdot 171}{5 \cdot 2}

$\frac{5 \cdot 171}{5 \cdot 2}$

Step 3.2.2

Cancel the common factor.

$\frac{5 \cdot 171}{5 \cdot 2}$

Step 3.2.3

Rewrite the expression.

$\frac{171}{2}$

Step 4

Divide.

$85.5$