Mathematics (2019) Grade(s): 4

MA19.4.21

Select and use an appropriate unit of measurement for a given attribute (length, mass, liquid volume, time) within one system of units: metric - km, m, cm; kg, g, l, ml; customary - lb, oz; time - hr, min, sec.

Unpacked Content

Knowledge

Students know:
  • units of measures for given attributes vary in size and are related by multiplicative comparison.

Skills

Students are able to:
  • Select and use appropriate units of measure for a given attribute.
  • Convert larger units of measure to smaller units of measure within the same measurement system.
  • Record measurement equivalents in a two-column table.

Understanding

Students understand that:
  • There is an appropriate unit of customary measurement and metric measurement for a given attribute.
  • Multiplicative relationships exist between customary units of length, mass, liquid volume, and time.
  • Multiplicative relationships exist between metric units of length, mass, liquid volume.

Vocabulary

  • Appropriate unit of measure
  • Metric
  • Customary
  • Equivalent
  • Conversion table
  • Mass
  • Liquid volume
  • Kilometer
  • Meter
  • Centimeter
  • Kilogram
  • Gram
  • liter
  • Milliliter
  • Ounce
  • Pound
  • Hour
  • Minute
  • Two-column table
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