Lesson 16
Baseten Blocks to Divide
Lesson Purpose
The purpose of this lesson is for students to make sense of baseten representations for division.
Lesson Narrative
In the previous lesson, students applied their understanding from grade 3 to divide two and threedigit numbers by onedigit divisors. Students worked with dividends slightly beyond 100 and represented their thinking in a way that made sense to them.
In this lesson, students work with larger dividends and represent problems with baseten blocks. This representation emphasizes place value, which supports the work with division in this section. Students are asked to represent their work with baseten blocks on paper, but that is not the emphasis of this lesson. In the next lesson, students will make sense of and use baseten diagrams. In future lessons, they will be able to choose a representation and method that makes sense to them as they go deeper into division work.
 Representation
Learning Goals
Teacher Facing
 Divide twodigit numbers by onedigit divisors using baseten blocks.
Student Facing
 Let’s use baseten blocks to divide.
Required Materials
Materials to Gather
Required Preparation
Activity 1:
 Each group of 3–4 students needs a set of baseten blocks that includes 4 hundreds blocks, 10 ten blocks, and 25 ones blocks.
Lesson Timeline
Warmup  10 min 
Activity 1  25 min 
Activity 2  10 min 
Lesson Synthesis  10 min 
Cooldown  5 min 
Teacher Reflection Questions
What surprised you about how students used baseten blocks to find the value of quotients? How might you use this in tomorrow’s lesson?
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)
Print Formatted Materials
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Additional Resources
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