In this lesson students build on prior understandings of rounding whole numbers to round decimals to different place values. In the first activity students label tick marks on number lines and reason about the possible value of a point on the number line. They consider which two decimals the point lies between, which of those decimals is closer, and how much closer. In the second activity, students round numbers to different places, first using the number lines provided and then using place value reasoning, supported by number lines if students choose to use them. A third activity provides extra rounding practice.
- Action and Expression
- Round decimals to the nearest whole, tenth, and hundredth.
- Let’s round decimals to the nearest whole, tenth, and hundredth.
|Activity 1||15 min|
|Activity 2||15 min|
|Activity 3||15 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
- Mystery Number (1–4), Stage 6: Decimals (Addressing)
- Get Your Numbers in Order (1–5), Stage 5: Decimals (Addressing)
Print Formatted Materials
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