Lesson: Writing and Evaluating Algebraic Expressions Mathematics • 7th Grade

In this lesson, we will learn how to write algebraic expressions and evaluate them for specific values of their variables.

Lesson Video

Sample Question Videos

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Lesson Worksheet

Q1:

Evaluate , given that and .

Q2:

Consider the shown trapezoid.

Write an expanded expression for its area. Simplify the expression, if possible.

The given trapezoid is the cross section of a prism of length . Write an expanded expression for the volume of the prism. Simplify the expression, if possible.

Q3:

Consider the shown trapezoid.

Write an expanded expression for its area. Simplify the expression, if possible.

The given trapezoid is the cross section of the given prism of length .

Write an expanded expression for the volume of the prism. Simplify the expression, if possible.