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Here is an alternative method for subtracting fractions that have a different denominator.
Here is a new concept:You must solve the sudoku before you can join the groupSudoku Rush
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Nice math trick!Here are more to enjoy:http://www.pedagonet.com/maths/mathtricks.htm
Here is a site that is a challenge to those who are mathematically adept
Try this one, use spacebar to bowl
Check it out:http://www.pedagonet.com/sudokuE/
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