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