# Ch 4: 6th-8th Grade Math: Number Theory

The Number Theory chapter aims to teach mathematical processes such as the conversion and comparison of numbers, and the identification of prime numbers. Administer the chapter's quizzes to your elementary and middle school students to test their retention of the material.

## Number Theory - Chapter Summary

This Number Theory chapter focuses on improving your students' knowledge of terms such as scientific notation, the greatest common factor and the least common multiple. The video lessons in this chapter can help students learn how to complete word problems, identify composite numbers and determine the prime factorization of a number. The videos contain tags for easy navigation to key points, and you will find useful self-assessment quizzes with the lessons.

## Chapter Lessons and Objectives

Lesson Objective
Converting Numbers to Scientific Notation In this lesson, students learn to convert numbers in standard notation to scientific notation.
Comparing Numbers Written in Scientific Notation Students learn to compare and order numbers in scientific notation.
Identifying Prime and Composite Numbers Instructors show students how to differentiate between composite numbers and prime numbers.
How to Find the Prime Factorization of a Number With this lesson, students can learn how to identify prime numbers and factors of numbers.
Finding the Prime Factorization with Exponents Students learn to determine when to use exponents when finding the prime factorization.
How to Find the Greatest Common Factor In this lesson, instructors teach the rules for calculating the greatest common factor.
How to Find the Least Common Multiple Instructors show their students how to determine the least common multiple.
Using Prime Factorizations to Find the Least Common Multiples Students discover the steps involved in using prime factorizations to find the least common multiple.
Word Problems: Greatest Common Factor and Least Common Multiple In this lesson, students learn to solve word problems that include the greatest common factor and the least common multiple.

Final Exam
Chapter Exam

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