# Ch 29: TABE Math - Grade 8: Expressions & Equations

### About This Chapter

## TABE Math - Grade 8: Expressions and Equations - Chapter Summary

The lessons in this chapter help you review expressions and equations, including negative exponents, square roots, cube roots, and scientific notation, before taking the TABE exam. Also reviewed is how to solve equations involving these concepts. By the end of this chapter, you should be familiar with:

- Changing negative exponents to fractions
- How to find the square root of a number
- Evaluating square roots of perfect squares
- How to find the cube root of a number
- Comparing numbers written in scientific notation

Short, engaging video lessons thoroughly review each concept, and corresponding self-assessment quizzes test your understanding and retention of the material. Knowledgeable instructors are available to answer any questions you may have. You can track your progress through the course by visiting your Dashboard.

### TABE Math Grade 8: Expressions and Equations - Chapter Objectives

The TABE exam measures student competency in multiple subject areas, including reading, mathematics computation, applied mathematics, language, vocabulary and spelling. This is a comprehensive test used in adult basic skills assessment, which can be administered for a variety of purposes, including as preparation for the GRE exam, or entrance into the workforce. The content found in this Grade 8: Expressions and Equations chapter is tested in the applied mathematics section, which makes up about 22% of the full-length TABE exam. This test can be administered in paper and pencil format or computer-based format and is a multiple-choice exam.

### 1. Changing Negative Exponents to Fractions

Changing negative exponents to fractions involves multiplying its inverse by itself to give the number a denominator. Explore more about changing negative exponents into fractions, including some practice problems with numbers and variables.

### 2. How to Find the Square Root of a Number

Calculating the square root of a number is the inverse operation of squaring that number. Explore how to find square roots, the square of numbers, perfect and imperfect squares, and some square root practice examples.

### 3. Evaluating Square Roots of Perfect Squares

A Perfect Square is found when a number is the square of another integer. Learn the notation of radicals in the language of math, and how to calculate the square-roots of Perfect Squares.

### 4. How to Find the Cube Root of a Number

A cube root of a number is the number that can be multiplied by itself three times, such as '2 * 2 * 2 = 8'. Learn the concepts of perfect cubes, negative cube roots, and how to find cube roots mathematically.

### 5. Comparing Numbers Written in Scientific Notation

When numbers cannot be easily expressed as a decimal, they are written using scientific notation. Learn about comparing numbers written in scientific notation and review examples of numbers with scientific notation to recognize which is larger and which is smaller.

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### Other Chapters

Other chapters within the TABE - Math: Practice & Study Guide course

- TABE Math - Grade K: Counting & Cardinality
- TABE Math - Grade 1: Geometry
- TABE Math - Grade 1: Operations & Algebraic Thinking
- TABE Math - Grade 2: Measurement & Data
- TABE Math - Grade 2: Number & Operations in Base Ten
- TABE Math - Grade 3: Measurement & Data
- TABE Math - Grade 3: Number & Operations in Base Ten
- TABE Math - Grade 3: Operations with Fractions
- TABE Math - Grade 3: Operations & Algebraic Thinking
- TABE Math - Grade 4: Geometry
- TABE Math - Grade 4: Measurement & Data
- TABE Math - Grade 4: Number & Operations in Base Ten
- TABE Math - Grade 4: Operations with Fractions
- TABE Math - Grade 4: Operations & Algebraic Thinking
- TABE Math - Grade 5: Geometry
- TABE Math - Grade 5: Measurement & Data
- TABE Math - Grade 5: Number & Operations in Base Ten
- TABE Math - Grade 5: Operations with Fractions
- TABE Math - Grade 6: Expressions & Equations
- TABE Math - Grade 6: Geometry
- TABE Math - Grade 6: The Number System
- TABE Math - Grade 6: Ratios & Proportional Relationships
- TABE Math - Grade 6: Statistics & Probability
- TABE Math - Grade 7: Expressions & Equations
- TABE Math - Grade 7: Geometry
- TABE Math - Grade 7: The Number System
- TABE Math - Grade 7: Ratios & Proportional Relationships
- TABE Math - Grade 7: Statistics & Probability
- TABE Math - Grade 8: Functions
- TABE Math - Grade 8: Geometry
- About the TABE Test
- TABE - Math Flashcards