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|Online interactive lessons, exercises, practice, and games about basic arithmetic concepts and methods, for grades K-8. Topics include addition, comparing quantities, counting, decimals, division, estimation, factors, fractions, money, multiplication, naming numbers, ordinal numbers, percent, place value, positions, properties, ratios, and subtraction. Spanish version available.|
|Levels:||Elementary, Middle School (6-8)|
|Resource Types:||Games, Problems/Puzzles, Web Interactive/Java|
|Math Topics:||Arithmetic/Early Math|
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