Common Core Math
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Learning Goal

Part of: Solve problems involving measurement and conversion of measurements from a larger unit to a smaller unit — 1 of 3 cluster items

Know relative sizes of measurement units within one system of units

4.MD.A.1

**4.MD.A.1**: Know relative sizes of measurement units within one system of units including km, m, cm; kg, g; lb, oz.; l, ml; hr, min, sec. Within a single system of measurement, express measurements in a larger unit in terms of a smaller unit. Record measurement equivalents in a two-column table. For example, know that 1 ft is 12 times as long as 1 in. Express the length of a 4 ft snake as 48 in. Generate a conversion table for feet and inches listing the number pairs (1, 12), (2, 24), (3, 36), ...

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4.MD.A.1: Know relative sizes of measurement units within one system of units including km, m, cm; kg, g; lb, oz.; l, ml; hr, min, sec. Within a single system of measurement, express measurements in a larger unit in terms of a smaller unit. Record measurement equivalents in a two-column table. For example, know that 1 ft is 12 times as long as 1 in. Express the length of a 4 ft snake as 48 in. Generate a conversion table for feet and inches listing the number pairs (1, 12), (2, 24), (3, 36), ...

What you'll learn

  1. State from memory the key conversion factors within the metric system (1 km = 1,000 m, 1 m = 100 cm, 1 kg = 1,000 g, 1 L = 1,000 mL) and the customary system (1 ft = 12 in, 1 lb = 16 oz, 1 hr = 60 min, 1 min = 60 sec)
  2. Describe a measurement relationship as a multiplicative comparison — for example, "1 foot is 12 times as long as 1 inch"
  3. Convert a measurement expressed in a larger unit to an equivalent measurement in a smaller unit by multiplying (e.g., 4 ft = 4 × 12 = 48 in)
  4. Generate a two-column conversion table showing number pairs for a given unit relationship and identify the multiplicative pattern in the table
  5. Apply unit conversion to solve real-world and mathematical problems involving length, mass/weight, capacity, and time

Slides

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