📖

Subtraction Strategy Showdown

Subtraction Within 20: Think Addition

Day 45of 180
Week 9of 36
30Minutes
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🖨️ Download Worksheet (PDF)🧮 Download Math Practice (PDF)
🎯 What You'll Learn

Learning Objectives

1

Compare and choose efficient subtraction strategies

2

Solve subtraction problems using multiple methods

3

Develop problem-solving confidence

📖 Scripture Connection

Proverbs 24:3-4

“Through wisdom a house is built, and by understanding it is established. By knowledge the rooms are filled with all precious and pleasant riches.”

— Proverbs 24:3-4 (WEB)

Just as we build mathematical understanding strategically, we build wisdom step by step

📦 Materials Needed

  • linking cubes
  • number line to 20
  • fact family cards
  • ten frames
  • pencil
  • worksheet
📚 Step-by-Step

Lesson Plan

1Opening (3 min)

Welcome to today's BibleMouse math adventure! Let's review our subtraction strategies from yesterday.

💭 Review Question: What strategy did we learn for breaking apart numbers?
2Teaching (10 min)

Today we'll have a Subtraction Strategy Showdown! We'll compare different ways to solve subtraction problems.

📌 Key Talking Points:
  • Remember counting up works well for close numbers
  • Breaking apart numbers can make subtraction easier
  • Choose the strategy that feels most comfortable
💬 Discussion Questions:
  • Which strategy helps you solve problems fastest?
  • What makes a strategy 'easy' for you?
3Activity: Subtraction Strategy Showdown (12 min)
game

Students will solve the same subtraction problem using multiple strategies, then choose their favorite.

📝 Instructions:
  1. Draw a subtraction problem card
  2. Solve using counting up method
  3. Solve using breaking apart method
  4. Choose and explain your preferred strategy
🔄 Variations:

Simpler: Use linking cubes to physically represent subtraction

Challenge: Create your own subtraction problems to solve

4Closing (3 min)

Celebrate your math problem-solving skills!

📝 Review Questions:
  • What strategies did you use today?
  • Which strategy felt easiest?

Coming up: Tomorrow we'll become Story Problem Detectives!

👨‍👩‍👧 For Parents

Teaching Notes

📚 Background:

First graders are developing flexible mathematical thinking

💡 Teaching Tips:
  • Encourage multiple solution methods
  • Praise effort over perfect answers
  • Make math feel like a fun exploration
🤔 Common Struggles:

Children may get frustrated switching between strategies

👀 Signs of Understanding:

Willingness to try different approaches

🚀 Want More?

Extension Activities

  • Create a subtraction strategy poster
  • Play 'Subtraction War' card game
  • Use BibleMouse Printables Library for extra practice worksheets

Ready for Tomorrow?

Great job completing today's lesson!

Continue to Day 46 →Back to Math