# Pre-Algebra Examples

The area of a trapezoid is equal to times the height times the sum of the bases .
Substitute the values of the height and bases ( and ) into the formula for the area of a trapezoid.
Multiply by to get .
Cancel the common factor of .
Write as a fraction with denominator .
Factor out the greatest common factor .
Cancel the common factor.
Rewrite the expression.
Simplify.
Multiply and to get .
Divide by to get .

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