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Lesson Plan

12. Practice: Identify unit lengths as invariant (FP)

teaches Common Core State Standards CCSS.Math.Content.5.MD.A.1 http://corestandards.org/Math/Content/5/MD/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
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Lesson objective: Convert from larger to smaller metric measurement units by using multiplication.

This lesson helps to build fluency with measurement conversion. A Metric Measurement Chart is used here because it is related to the Base-10 Place Value system. This work develops students' understanding of equivalence because when we convert between measurement units, the length of the item remains the same.

Students engage in Mathematical Practice 2 (Reason abstractly and quantitatively) as they make sense of how metric measurement units compare, such as 10 mm = 1 cm, 100 cm = 1 m, 1000 m = 1 km.  Students will make sense of quantities and their relationships in problem situations by converting between various metric units when measuring length.

Key vocabulary:

  • equivalent
  • length
  • measurement
  • metric abbreviations (km, hm, dam, m, dm, cm, mm)
  • metric prefixes (kilo-, hecto-, deka-, deci-, centi-, milli-)
  • scale

 

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