In mathematics, customary units commonly include inches, feet, yards, miles for length; ounces, pounds, and tons for weight; and gallons, quarts, pints, and fluid ounces for volume. Metric units comprise millimeters, centimeters, meters, and kilometers for length; grams, kilograms, and metric tons for weight; and milliliters and liters for volume. Both systems serve to measure various physical quantities, with the metric system being based on powers of ten, making it easier for calculations. The choice between them often depends on regional preferences and specific applications.
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