Basic Math Examples

Find the Mean 2/5 , 3/10 , 1/10
, ,
Step 1
The mean of a set of numbers is the sum divided by the number of terms.
Step 2
Simplify the numerator.
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Step 2.1
To write as a fraction with a common denominator, multiply by .
Step 2.2
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
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Step 2.2.1
Multiply by .
Step 2.2.2
Multiply by .
Step 2.3
Combine the numerators over the common denominator.
Step 2.4
Simplify the numerator.
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Step 2.4.1
Multiply by .
Step 2.4.2
Add and .
Step 2.5
Combine the numerators over the common denominator.
Step 2.6
Add and .
Step 2.7
Cancel the common factor of and .
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Step 2.7.1
Factor out of .
Step 2.7.2
Cancel the common factors.
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Step 2.7.2.1
Factor out of .
Step 2.7.2.2
Cancel the common factor.
Step 2.7.2.3
Rewrite the expression.
Step 3
Multiply the numerator by the reciprocal of the denominator.
Step 4
Multiply .
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Step 4.1
Multiply by .
Step 4.2
Multiply by .
Step 5
Divide.
Step 6
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.