Math: Chapter Four

Math Chapter Four: Number Theory and Fractions

Chapter four lays much groundwork for the addition, subtraction, multiplication, and division of fractions.  Some stratagies may seem a little different as the students learn to manipulate numbers.  Check the video tutors for this chapter with the Holt McDougal edition.  The older Prentice Hall series has this for chapter three.

Chapter Focus - Know that a fraction can be viewed as parts of a whole, and use multiplication and division to determine equivalent fractions.

Real World Connections - Recipes often list quantities of ingredients as fractions and mixed numbers.  Chefs must be able to work with these numbers in order to follow recipes.  Many construction and home repair applications involve the use of fractions.


Click on this link to go to the texbook website:

This website has useful definitions for math work:

Click on this linkto go the old Prentice Hall's (the textbook publisher) link for video tutors.  Although we no longer use this series, these video tutors may be useful.

Here are more links for on-line math help: 

This has a variety of student-created videos.

 Dr. Math

Hot Math is

AAA Math is

Math is Fun

This is an easy-to-use site to create graphs

This site has many videos for math and science related topics.  Scroll down to the bottom for links for elementary school math videos.

Games involving fractions:

Equivalent Fractions:

Cookies for Grampy:

Add and Subract Fractions with like denominators:

Change Improper to Mixed:

Mixed to Improper (simplest form) Fractions: