This site provides a review of rules, with examples, on calculating using fractions. The review starts with rules and definitions, then adding, subtracting, multiplying and dividing, simplifying (reducing) and prime numbers.
From site:
Getting the help with fractions that you've always wanted is now available. Parents, grandparents, teachers and students alike can finally master these types of problems, because everything is covered with details not presented at other sites. For many students, doing math homework of any kind can be a SCARY! prospect. But...FEAR NOT!
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