Unit 4, Lesson 21
Zeros in the Standard Algorithm
Grade 4
Preparation
Lesson Narrative
These problems can be challenging for students because they require special attention to make sense of how the multiple regroupings work and how they are recorded in the standard algorithm.
- Representation
- MLR8
- Interpret (orally) written methods that use the standard algorithm to subtract when the minuend has several zeros.
- Use the standard algorithm to subtract within 100,000 when the minuend has several zeros.
- Let’s subtract from numbers with several zeros.
Required Materials
Activity 2
Required Preparation
None
Suggested Centers
NoneTeacher Reflection Questions
Which parts of this lesson gave you insight into how students are subtracting across zero? What insights did you gain?