Lesson 17
Representemos la división con diagramas en base diez
Lesson Purpose
Lesson Narrative
In grade 3, students used base-ten representations to help them reason about division of a two-digit number into equal-size groups. This lesson builds on that understanding and revisits it in the context of three-digit dividends. Students recall that they can exchange or decompose one or more units of a higher place value for 10 units of the next lower place value in order to have enough units to put into equal groups.
The work here sets the groundwork for students to later decompose a dividend by place value (even when not using base-ten blocks or diagrams). It is also the basis for dividing multi-digit numbers using the standard division algorithm (in grade 5), which relies on dividing by place value, one digit at a time.
- Engagement
- MLR8
Learning Goals
Teacher Facing
- Divide two- and three-digit by one-digit numbers using base-ten diagrams.
Student Facing
- Dividamos usando bloques en base diez o diagramas.
Required Materials
Materials to Gather
Required Preparation
CCSS Standards
Addressing
Lesson Timeline
Warm-up | 10 min |
Activity 1 | 15 min |
Activity 2 | 20 min |
Lesson Synthesis | 10 min |
Cool-down | 5 min |
Teacher Reflection Questions
Suggested Centers
- Compare (1–5), Stage 4: Divide within 100 (Supporting)
- Rolling for Fractions (3–5), Stage 2: Multiply a Fraction by a Whole Number (Supporting)