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Measure with Metric

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https://www.quora.com/The-smallest-unit-of-a-ruler-is-1mm-Two-students-measured-the-width-of-a-wooden-block-and-recorded-them-as-5-25-cm-and-5-27-cm-Are-these-two-equally-precise from books.google.com

Introduces the principles of the metric system through simple experiments.