Ch 45: 8th Grade Math: Rates, Ratios & Proportions

About This Chapter

The fun and practical videos in this chapter show 8th graders about rates, ratios and proportions. There are also short lesson quizzes and a chapter exam for you to use to determine what your students have retained.

Rates, Ratios & Proportions - Chapter Summary

Utilize the video lessons in this chapter to help your students gain a deeper understanding of rates, ratios and proportions. The clever videos entertain students while teaching them methods for solving everyday problems involving money, time, rate and distance. You can use the multiple-choice quizzes to see where students may need further clarification, and the chapter exam can show you what they have gained from this chapter.

Chapter Lessons and Objectives

Lesson Objective
Ratios & Rates: Definitions & Examples Students learn to calculate ratios and rates.
How to Find the Unit Rate In this lesson, students determine the unit rate by using a denominator of one.
How to Solve a One-Step Problem Involving Ratios Students explore the process of solving one-step problems with ratios.
How to Solve a One-Step Problem Involving Rates In this lesson students learn to solve one-step problems with rates.
How to Solve Problems with Money This lesson takes students through the process of multiplying the number of units by the cost per unit to determine the total cost.
Proportion: Definition, Application & Examples Students explore proportions and how they apply to the world around them.
Calculations with Ratios and Proportions Students have the chance to practice determining ratios and proportions to solve problems.
How to Solve Problems with Time In this lesson students learn the work rate formula for calculating time.
Distance Formulas: Calculations & Examples Instructors explain how to figure out distance as well as how to determine distance plus distance and distance plus fuel.
How to Find an Unknown in a Proportion Students discover ways to find an unknown in a proportion.
How to Calculate Unit Rates Associated with Ratios of Fractions With this lesson, students learn to determine unit rates by figuring out ratios of lengths, areas and other quantities measured in like or different units.
Assessing Proportional Relationships Between Two Quantities Students have the opportunity to test for equivalent ratios in a table to find out if two quantities are in a proportional relationship.
Identifying the Constant of Proportionality (Variation) Students examine how to find the constant of proportionality.
Representing Proportional Relationships by Equations This lesson shows students how to write equations for proportional relationships.
Graphing Proportional Relationships Instructors explain how to interpret graphs of proportional relationships.
How to Use Proportional Relationships to Solve Multistep Ratio and Percent Problems Students discover methods to use proportional relationships to solve multistep ratio and percent problems like estimating the population size using percent of change.
Constructing Proportions to Solve Real World Problems In this lesson, students learn to construct proportions and their applications.

6 Lessons in Chapter 45: 8th Grade Math: Rates, Ratios & Proportions
Test your knowledge with a 30-question chapter practice test
Ratios & Rates: Definitions & Examples

1. Ratios & Rates: Definitions & Examples

If we have two items, or two numbers, and we want to compare them, what language can we use? How do we write the comparison? Find out as we learn about ratios and rates in this lesson.

How to Solve Problems with Money

2. How to Solve Problems with Money

Money matters, and knowing how much things cost will be useful no matter where you go. In this lesson, we'll learn the steps for solving word problems involving money.

Proportion: Definition, Application & Examples

3. Proportion: Definition, Application & Examples

When we want to compare one ratio, or fraction, to another equivalent ratio, it's a proportion. Learn all about proportions and practice solving proportion problems in this lesson.

Calculations with Ratios and Proportions

4. Calculations with Ratios and Proportions

Even if only 99 out of 100 people need to know how to work with ratios, the odds that they'll be useful to you are very high. In this lesson, we'll practice performing calculations with ratios and proportions.

How to Solve Problems with Time

5. How to Solve Problems with Time

It's amazing how much time can be saved when people work together. In this lesson, we'll practice figuring out just how much time we're talking about as we solve problems involving time.

Distance Formulas: Calculations & Examples

6. Distance Formulas: Calculations & Examples

Let's go on a road trip! In this lesson, we'll practice calculations involving distance, rate and time. We'll also look at how we determine the relationship between distance and fuel.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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Other Chapters

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