📖

Recording Subtraction Regrouping

Subtraction Within 100: Regrouping Introduction

Day 43of 180
Week 9of 36
30Minutes
← Day 42Day 43 of 180Day 44 →
🖨️ Download Worksheet (PDF)🧮 Download Math Practice (PDF)
🎯 What You'll Learn

Learning Objectives

1

Record subtraction problems using standard regrouping algorithm

2

Understand how to symbolically represent trading tens for ones

3

Develop perseverance in mathematical problem-solving

📖 Scripture Connection

Proverbs 22:29

“Do you see a man skilled in his work? He will stand before kings; he won't stand before obscure men.”

— Proverbs 22:29 (WEB)

Demonstrates the importance of practicing and mastering skills systematically

📦 Materials Needed

  • Base-ten blocks
  • Place value mat
  • Pencil
  • BibleMouse Regrouping Worksheet
  • Whiteboard marker
📚 Step-by-Step

Lesson Plan

1Opening (5 min)

BibleMouse warm-up: Review previous day's regrouping concepts using base-ten blocks

💭 Review Question: What happens when we don't have enough ones to subtract?
2Teaching (10 min)

Demonstrate recording regrouping step-by-step on whiteboard

📌 Key Talking Points:
  • Show how to cross out the tens column when trading
  • Model writing the new digit above the problem
  • Explain each symbolic step carefully
💬 Discussion Questions:
  • What do the numbers represent?
  • How is trading tens for ones like sharing?
3Activity: BibleMouse Regrouping Record Sheet (12 min)
worksheet

Complete 10 subtraction problems using standard algorithm

📝 Instructions:
  1. Use base-ten blocks to model each problem first
  2. Record the problem on your worksheet
  3. Show all regrouping steps clearly
  4. Check your work using blocks
🔄 Variations:

Simpler: Use fewer problems, provide more visual support

Challenge: Add word problems requiring regrouping

4Closing (3 min)

Quick review of regrouping process

📝 Review Questions:
  • What do we do when we don't have enough ones?
  • How do we show trading on our paper?

Coming up: Tomorrow we'll practice more regrouping problems and build confidence

👨‍👩‍👧 For Parents

Teaching Notes

📚 Background:

Regrouping is a critical math skill that requires patience and practice

💡 Teaching Tips:
  • Use manipulatives to make abstract concepts concrete
  • Praise effort over perfection
  • Be patient with the learning process
🤔 Common Struggles:

Children often get confused about 'borrowing' or 'trading' in subtraction

👀 Signs of Understanding:

Consistent understanding of place value and systematic problem-solving

🚀 Want More?

Extension Activities

  • Create a regrouping game using dice
  • Practice mental math strategies for subtraction

Ready for Tomorrow?

Great job completing today's lesson!

Continue to Day 44 →Back to Math