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More Lessons for Grade 7

Math Worksheets

Exampls, solutions, videos, worksheets, and activities to help Algebra 1 or grade 7 students learn how to evaluate algebraic expressions.

An algebraic expression is an expression in which some or all of the terms contain variables. If the values of the variables are known then we can evaluate the expression.

**How to evaluate algebraic expressions?**

1. Substitute the value of the variables into the expression.

2. Evaluate using the order of operation.

For example:

To evaluate 3*x* + 1 for *x* = −2, we substitute −2 in place of *x*

3(−2) + 1 = −6 + 1 = −5

**Evaluating Algebraic Expressions**
**Examples Part 1: Evaluating Variable Expressions**

This video provides two basic examples of evaluating a variable expression.

**Examples Part 2: Evaluating Variable Expressions**

This video provides two more examples of evaluating a variable expression.
**Evaluating an expression with multiple variables**

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

More Lessons for Grade 7

Math Worksheets

Exampls, solutions, videos, worksheets, and activities to help Algebra 1 or grade 7 students learn how to evaluate algebraic expressions.

An algebraic expression is an expression in which some or all of the terms contain variables. If the values of the variables are known then we can evaluate the expression.

1. Substitute the value of the variables into the expression.

2. Evaluate using the order of operation.

For example:

To evaluate 3

3(−2) + 1 = −6 + 1 = −5

Remember to use order of operations to evaluate and be careful with the negative signs.

This video provides two basic examples of evaluating a variable expression.

This video provides two more examples of evaluating a variable expression.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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