Lesson 20

Sumemos y restemos hasta 1,000,000

Lesson Purpose

The purpose of this lesson is for students to add and subtract within 1,000,000 with multiple compositions or decompositions.

Lesson Narrative

In this lesson, students use the standard algorithm for addition and subtraction to the hundred-thousands place. They build their fluency with the algorithm as they encounter examples where more than one digit has to be decomposed in order to subtract. Students also look at errors that are commonly made when using the algorithm to find sums and differences.

  • Action and Expression
  • MLR8

Activity 1: Sumemos y restemos números grandes

Learning Goals

Teacher Facing

  • Add and subtract multi-digit numbers, with multiple compositions or decompositions, using the standard algorithm.

Student Facing

Usemos el algoritmo estándar para sumar y restar.

Required Materials

Materials to Gather

Required Preparation

CCSS Standards


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

What connections did students make between the decomposition of base-ten units using expanded form and using the standard algorithm when subtracting large numbers?

Suggested Centers

  • Tic Tac Round (3–5), Stage 2: Any Place (Addressing)
  • Number Puzzles: Addition and Subtraction (1–4), Stage 6: Beyond 1,000 (Addressing)

Print Formatted Materials

Teachers with a valid work email address can click here to register or sign in for free access to Cool Down, Teacher Guide, and PowerPoint materials.

Student Task Statements pdf docx
Lesson Cover Page pdf docx
Cool Down Log In
Teacher Guide Log In
Teacher Presentation Materials pdf docx