Evaluating mathematical expressions

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Taught by mrbrianmclogan
  • Currently 3.0/5 Stars.
7376 views | 1 rating
Part of video series
Meets NCTM Standards:
Errors in this video:

The answer to the second problem is listed as 12, but it should be -12.

Lesson Summary:

In this lesson, students will learn how to evaluate mathematical expressions by finding the value for a given set of terms. They will understand the importance of identifying the keyword "value weight" in their problem and know how to plug in the given values for each variable. The lesson also includes a rational expression problem, which will show students how to apply the order of operations to simplify the expression before finding the value. By the end of the lesson, students will be able to evaluate different kinds of expressions and solve problems with ease.

Lesson Description:

How to evaluate mathematical expressions

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Questions answered by this video:
  • How do you evaluate variable expressions?
  • If D = 1/2, A = 1.2, B = -6, and C = 5, what does DA - BC equal?
  • If D = 1/2, A = 1.2, B = -6, and C = 5, how do you evaluate 2a(4b - 1)/c?
  • What does it mean to evaluate an expression?
  • Staff Review

    • Currently 3.0/5 Stars.
    This lesson shows how to evaluate variable expressions given the value of the variables. Each step is shown for computing the value of the expression. One of the variable values is a fraction, one is a decimal, one is a negative integer, and one is a positive integer in this problem. The siren in the background 2 different times is a little annoying, however.