Lesson 4: Working with Three Digit Numbers

Lesson 4: Working with Three Digit Numbers.  Prod. Math Mastery.  Math Mastery, 2001. Discovery Education. Web. 22 May 2013. <http://www.discoveryeducation.com/>.

Math Mastery (Producer).  (2001). Lesson 4: Working with Three Digit Numbers. [TitleChapter].  Available from http://www.discoveryeducation.com/

Math Mastery. "Lesson 4: Working with Three Digit Numbers."
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