In grade 4, students began converting units of measurements by multiplying. The work in grade 5 expanded to include conversion by dividing, but was still restricted to units within the same measurement system. In this lesson, students progress to converting units that may be in different systems of measurement, using ratio reasoning and recently-learned strategies such as double number lines, tables, and multiplication or division of unit rates.
- Choose and create a double number line diagram or table to solve problems involving unit conversion.
- Explain (orally) how to use a “rate per 1” to solve problems involving unit conversion.
- Recognize that when we measure things in two different units, the pairs of measurements are equivalent ratios.
Let’s convert measurements to different units.
- I can convert measurements from one unit to another, using double number lines, tables, or by thinking about “how much for 1.”
- I know that when we measure things in two different units, the pairs of measurements are equivalent ratios.