In grade 3, students rounded whole numbers to the nearest 10 and 100. In previous lessons, they worked to find the closest multiples of powers of 10. Here, students build on this work to round whole numbers to the nearest 1,000, 10,000, and 100,000. Students revisit the convention of rounding up when a number is exactly halfway between two consecutive multiples of a power of 10.
- Action and Expression
Activity 1: ¿Redondear a qué?
- Round multi-digit whole numbers to the nearest 1,000, 10,000, and 100,000.
- Redondeemos algunos números grandes.
|Activity 1||20 min|
|Activity 2||15 min|
|Activity 3||20 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
- Mystery Number (1–4), Stage 5: Six-digit Numbers (Addressing)
- Tic Tac Round (3–5), Stage 1: Nearest Ten or Hundred (Supporting)