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Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Adding and Subtracting Fractions
This video shows how to add and subtract fractions with like and unlike denominators. Practice problems are available. [9:49]
Imagine Learning Classroom
Learn Zillion: Add Fractions With Tenths and Hundredths Denominators
In this lesson, you will learn how to add fractions with tenths and hundredths denominators. [3:13]