Use inches, feet, yards, miles. Measure to the nearest millimeter. Use millimeter, centimeter, meter, kilometer. Measure weight to the nearest ounce. Measure weight to the nearest gram.
Measure angles to the nearest degree.
Convert from Metric to English units. Convert from English to Metric units. Compute areas of squares, rectangles, and parallelograms. Compute areas of triangles. Compute areas of trapezoids.