# Ch 15: 8th Grade Math: Operations with Decimals

### About This Chapter

## 8th Grade Math: Operations with Decimals - Chapter Summary

This chapter covers the basics of using operations with decimals, including tips on how to estimate solutions and solve two-step problems. Middle school students will also get a chance to hone their skills in mapping decimal differences and simplifying expressions. At the end of the chapter, students have a chance to take a comprehensive test that indicates how well they retained the presented information.

## Chapter Lessons and Objectives

Lesson | Objective |
---|---|

Inequalities with Decimals | Students are presented with decimal inequalities and instructed on how to solve them. |

Converting Decimals to Mixed Numbers | This lesson shows how to change a decimal into a mixed number. |

Adding and Subtracting Decimals: Examples & Word Problems | Using word problems, this lesson demonstrates how to add and subtract decimals. |

Multiplying and Dividing Decimals: Examples & Word Problems | Students study how to multiply and divide decimals. |

How to Estimate with Decimals to Solve Math Problems | Instructors provide examples of how to estimate decimals to solve problems. |

Practice Estimating Sums, Differences, and Products of Decimals | At the end of this lesson, students should have a firm grasp of estimating decimals. |

Solving Problems using Decimal Numbers | Students solve problems involving decimals and fractions. |

Solving One and Two Operation Problems Involving Positive Decimals With Estimation | Instructors show students how to use estimation to solve operation problems with decimals. |

Solving One and Two Operation Problems Involving Positive Decimals With Guess and Check | This lesson guides students through solving problems with lists and tables. |

Solving One and Two Operation Problems Involving Positive Decimals by Looking for a Pattern | With this lesson, students learn how to look for patterns to solve decimal-related operations problems. |

How to Solve Multi-step Inequalities with Decimals | This lesson covers how to figure out multi-step inequalities. |

Maps with Decimal Distances | Students view problems involving decimal maps and are instructed on how to solve them. |

Simplify Expressions Involving Decimals | Complicated expressions can be simplified, and this lesson shows your student how. |

### 1. Adding and Subtracting Decimals: Examples & Word Problems

In math, we sometimes have to deal with decimal numbers instead of our nice whole numbers. Watch this video lesson to learn the one thing that you have to take into consideration when adding and subtracting decimals.

### 2. Multiplying and Dividing Decimals: Examples & Word Problems

Watch this video lesson to learn what you need to do to get a correct answer when multiplying and dividing decimals. Learn the easy tricks to figuring out where the decimal point goes.

### 3. How to Estimate with Decimals to Solve Math Problems

Watch this video lesson to learn how you can estimate problems with decimals in them so you can get a quick answer when you need it - for example, when you are at the gas station and you need to know how much gas you can afford.

### 4. Solving Problems Using Decimal Numbers

Problems involving decimal numbers might sound like a way to torture you, but learning how important these types of problems are in the real world is important. In this lesson, you will see a couple areas in life where you routinely encounter decimal number problems.

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### Other Chapters

Other chapters within the 8th Grade Math: Practice & Review course

- 8th Grade Math: Basic Arithmetic Operations
- 8th Grade Math: Divisibility
- 8th Grade Math: Number Properties
- 8th Grade Math: Number Theory
- 8th Grade Math: Factoring
- 8th Grade Math: Estimation and Rounding
- 8th Grade Math: Whole Numbers
- 8th Grade Math: Simplifying Whole Number Expressions
- 8th Grade Math: Negative Numbers
- 8th Grade Math: Absolute Value
- 8th Grade Math: Integers
- 8th Grade Math: Rational Numbers
- 8th Grade Math: Inequalities
- 8th Grade Math: Introduction to Decimals
- 8th Grade Math: Introduction to Fractions
- 8th Grade Math: Operations with Fractions
- 8th Grade Math: Percents
- 8th Grade Math: Exponents & Exponential Expressions
- 8th Grade Math: Roots & Radical Expressions
- 8th Grade Math: Basic Algebraic Expressions
- 8th Grade Math: Algebraic Distribution
- 8th Grade Math: Simplifying & Solving Rational Expressions
- 8th Grade Math: The Coordinate Graph
- 8th Grade Math: Linear Equations
- 8th Grade Math: Systems of Linear Equations
- 8th Grade Math: Properties of Functions
- 8th Grade Math: Graphing Functions
- 8th Grade Math: Solving Math Word Problems
- 8th Grade Math: Introduction to Geometric Figures
- 8th Grade Math: Triangles in Geometry
- 8th Grade Math: Quadrilaterals in Geometry
- 8th Grade Math: Circles in Geometry
- 8th Grade Math: Circular Arcs & Measurement in Geometry
- 8th Grade Math: Polyhedrons and Geometric Solids
- 8th Grade Math: Symmetry, Similarity & Congruence in Geometry
- 8th Grade Math: Triangle Theorems and Proofs in Geometry
- 8th Grade Math: Similar Polygons in Geometry
- 8th Grade Math: The Pythagorean Theorem in Geometry
- 8th Grade Math: Units of Measurement
- 8th Grade Math: Measuring Perimeter & Area
- 8th Grade Math: Data & Graphs
- 8th Grade Math: Probability
- 8th Grade Math: Statistics
- 8th Grade Math: Rates, Ratios & Proportions
- 8th Grade Math: Consumer Math
- 8th Grade Math: Number Sequences
- 8th Grade Math: Sets & Subsets
- 8th Grade Math: Algebraic Monomials & Polynomials