📖

Three-Digit Subtraction Introduction

Review and Extension: Addition and Subtraction Within 100

Day 138of 180
Week 28of 36
30Minutes
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🖨️ Download Worksheet (PDF)🧮 Download Math Practice (PDF)
🎯 What You'll Learn

Learning Objectives

1

Understand how to subtract three-digit numbers by breaking them into hundreds, tens, and ones

2

Demonstrate ability to use base-ten blocks to model subtraction

3

Develop patience and persistence in problem-solving

📖 Scripture Connection

Proverbs 3:13-14

“Happy is the man who finds wisdom, the man who gets understanding. For her good profit is better than silver, and her increase than fine gold.”

— Proverbs 3:13-14 (WEB)

Just as we break down math problems into smaller steps, wisdom comes from carefully understanding each part of a challenge

📦 Materials Needed

  • Base-ten blocks
  • Subtraction worksheets
  • Pencil
  • Whiteboard and marker
📚 Step-by-Step

Lesson Plan

1Opening (5 min)

BibleMouse Math Adventure: Introducing three-digit subtraction

💭 Review Question: Can you tell me how we subtracted two-digit numbers yesterday?
2Teaching (10 min)

Demonstrating three-digit subtraction with base-ten blocks

📌 Key Talking Points:
  • Remember how we learned to subtract by breaking numbers into parts?
  • Now we'll do the same with three-digit numbers
  • We'll subtract hundreds, tens, and ones separately
💬 Discussion Questions:
  • What do you notice about how we move blocks?
  • How is this like solving a puzzle?
3Activity: Block Subtraction Challenge (12 min)
hands-on

Use base-ten blocks to solve subtraction problems

📝 Instructions:
  1. Select a three-digit subtraction problem
  2. Build the first number with blocks
  3. Remove blocks to represent subtraction
  4. Count remaining blocks to find answer
🔄 Variations:

Simpler: Use problems with no regrouping

Challenge: Include problems requiring borrowing

4Closing (3 min)

Review key subtraction strategies

📝 Review Questions:
  • What did we learn about subtracting three-digit numbers?
  • How do base-ten blocks help us understand subtraction?

Coming up: Tomorrow we'll solve multi-step word problems using these new skills

👨‍👩‍👧 For Parents

Teaching Notes

📚 Background:

Three-digit subtraction builds on two-digit skills

💡 Teaching Tips:
  • Be patient and encourage exploration
  • Let child make mistakes and learn from them
  • Use positive, encouraging language
🤔 Common Struggles:

Remembering to subtract hundreds, tens, and ones separately

👀 Signs of Understanding:

Child confidently manipulating base-ten blocks

🚀 Want More?

Extension Activities

  • Create subtraction stories using blocks
  • Play 'Subtraction Bingo' with three-digit numbers

Ready for Tomorrow?

Great job completing today's lesson!

Continue to Day 139 →Back to Math