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Strategy Review: Subtraction Toolbox

Review: Operations Within 20

Day 147of 180
Week 30of 36
30Minutes
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🖨️ Download Worksheet (PDF)🧮 Download Math Practice (PDF)
🎯 What You'll Learn

Learning Objectives

1

Demonstrate at least 3 different subtraction strategies

2

Solve subtraction problems within 20 using flexible thinking

3

Develop confidence 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)

Encourages developing skill and mastery in problem-solving, just like we're practicing math strategies

📦 Materials Needed

  • Dice
  • Flashcards
  • Pencil
  • Paper
  • Small manipulatives (buttons or counters)
📚 Step-by-Step

Lesson Plan

1Opening (5 min)

BibleMouse subtraction strategy warm-up game

💭 Review Question: What subtraction strategies do you remember from our previous lessons?
2Teaching (10 min)

Review of subtraction strategies: counting back, thinking addition, decomposing

📌 Key Talking Points:
  • Counting Back: Start at a number and count down
  • Think Addition: Use addition to solve subtraction
  • Decomposing: Break numbers into easier parts
💬 Discussion Questions:
  • Which strategy feels easiest for you?
  • Can you show me how you solve a subtraction problem?
3Activity: Subtraction Dice Challenge (12 min)
hands-on

Roll two dice, subtract the smaller number from the larger

📝 Instructions:
  1. Roll two dice
  2. Identify larger and smaller numbers
  3. Use your favorite subtraction strategy to solve
  4. Record your equation on paper
🔄 Variations:

Simpler: Use dice with smaller numbers (1-6)

Challenge: Use three dice and choose most complex subtraction

4Closing (3 min)

Review strategies learned

📝 Review Questions:
  • What was your favorite subtraction strategy today?
  • Can you explain how you solved a problem?

Coming up: Tomorrow we'll play Math Fact Marathon to build speed and accuracy

👨‍👩‍👧 For Parents

Teaching Notes

📚 Background:

First-grade students are developing multiple problem-solving approaches

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

Remembering multiple strategies, staying focused

👀 Signs of Understanding:

Willingness to try different approaches, growing confidence

🚀 Want More?

Extension Activities

  • Create a subtraction strategy poster
  • Play online subtraction games from BibleMouse Printables Library

Ready for Tomorrow?

Great job completing today's lesson!

Continue to Day 148 →Back to Math