Number+and+Computation+-+6

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 * Decimal Comparisons**

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 * Properties**

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 * Order of Operations** (Rags to Riches)

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 * Place Value** (Rags to Riches)

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 * Decimal Place Value** (Rags to Riches)

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 * Rounding** (Double Jeopardy)

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 * Common Factors**

http://www.webmath.com/index.html
 * LCM / GCF**

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 * Least Common Multiple**

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 * Finding Prime Factors**

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 * Factor Trees**

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 * Decimals Word Problems** (Rags to Riches)

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 * Using Number Patterns, Fractions, and Decimals** (Rags to Riches)

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 * Base Ten Blocks**

http://www.amblesideprimary.com/ambleweb/mentalmaths/fracto.html
 * The Decifractor**

 **The Decimals Number Line Tool**  []