Crud City is a civilization of microbes who live a frontier-like existence. They have a bartering system where they trade things like lint balls, dust flakes, slime, and rotten apple cores. To do so, they need to be well versed in the use of fractions, decimals, and percents. Students join the caravan and try to make all the right trades, positioning themselves to vie for the final prize which involves a diabolical twist.

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Workbook - #341