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Ch 13: Elementary Math: Proportional Relationships & Number Theory

About This Chapter

Review the lessons in this chapter to study elementary math instruction strategies for number theory and proportional relationships. The chapter includes short lessons and quizzes that can boost your teaching skills or help you study for a teacher certification test.

Elementary Math: Proportional Relationships & Number Theory - Chapter Summary

In this chapter, our expert instructors break down a variety of topics and instructional strategies for elementary math. These lessons focus on proportional relationships and number theory, and as you progress through the chapter, you'll review instructional strategies related to ratios, rates, proportions, factoring, multiples, prime numbers and composite numbers. When you're finished with the chapter material, you should be able to:

  • Interpret examples of ratios and rates
  • Find unit rates
  • Make ratio and proportion calculations
  • Teach students how to factor
  • Recognize prime and composite numbers
  • Define the concept of a multiple in math

When you finish a lesson, try the accompanying self-assessment quiz to check your understanding of the material. If you get a quiz question wrong, you'll be able to go back and find the correct answer within the lesson. You can submit questions though the Ask the Expert feature if you need any help with the material, and to make your studying experience flexible, we've made the chapter materials accessible on any device that has an Internet connection.

6 Lessons in Chapter 13: Elementary Math: Proportional Relationships & Number Theory
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 Find the Unit Rate

2. How to Find the Unit Rate

If we are going to use math to predict outcomes, one of the most useful measures we can establish is the unit rate of change. In this lesson, you'll learn how to find the rate of change and apply the formula to real-life examples.

Calculations with Ratios and Proportions

3. 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 Teach Factoring

4. How to Teach Factoring

Learning how to factor is an important foundation to many more complex mathematical activities. This lesson will offer you a range of choices that will help you teach factoring to children.

Identifying Prime & Composite Numbers

5. Identifying Prime & Composite Numbers

In this video lesson, you will learn how to identify both prime and composite numbers. You will also learn what makes the numbers unique, as well as the characteristics of both these types of numbers.

What is a Multiple in Math? - Definition & Overview

6. What is a Multiple in Math? - Definition & Overview

In this lesson we will learn about multiples, a useful concept usually introduced in grammar school multiplication tables. Understanding multiples allows you to find the least common multiple or least common denominator for two or more numbers.

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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