📖

Adding by Place Value

Addition Within 100: Mental Math Strategies

Day 27of 180
Week 6of 36
30Minutes
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🖨️ Download Worksheet (PDF)🧮 Download Math Practice (PDF)
🎯 What You'll Learn

Learning Objectives

1

Understand how to add two-digit numbers by separating tens and ones

2

Demonstrate mental math skills for adding within 100

3

Develop problem-solving confidence in mathematics

📖 Scripture Connection

Proverbs 2:2

“So that you incline your ear to wisdom, and apply your heart to understanding;”

— Proverbs 2:2 (WEB)

Just as we carefully break down numbers into parts to solve math problems, we can break down wisdom and understanding piece by piece

📦 Materials Needed

  • Base-ten blocks
  • Place value chart
  • Pencil
  • Notebook
  • BibleMouse Math Worksheet
📚 Step-by-Step

Lesson Plan

1Opening (5 min)

Welcome to today's BibleMouse math adventure! Let's review our previous mental math strategies and prepare for a new challenge.

💭 Review Question: Can you tell me how we added tens to numbers yesterday?
2Teaching (10 min)

Today we'll learn to add two-digit numbers by splitting them into tens and ones. We'll use base-ten blocks to visualize this process.

📌 Key Talking Points:
  • Every number has a tens place and a ones place
  • We can add tens and ones separately
  • Combining the parts gives us our total
💬 Discussion Questions:
  • What do you notice about place values?
  • How can we make adding easier?
3Activity: Place Value Addition Challenge (12 min)
hands-on learning

Use base-ten blocks to solve addition problems, separating tens and ones

📝 Instructions:
  1. Take two two-digit numbers
  2. Separate blocks by tens and ones
  3. Add tens together
  4. Add ones together
  5. Combine results
🔄 Variations:

Simpler: Use smaller numbers under 50

Challenge: Add three two-digit numbers

4Closing (3 min)

Celebrate your math learning today!

📝 Review Questions:
  • What strategy did we learn today?
  • How can breaking numbers into parts help us add?

Coming up: Tomorrow we'll explore the 'friendly numbers' strategy for even faster mental math

👨‍👩‍👧 For Parents

Teaching Notes

📚 Background:

Place value is foundational to understanding more complex math concepts

💡 Teaching Tips:
  • Use manipulatives to make abstract concepts concrete
  • Celebrate effort and process over perfect answers
  • Encourage thinking out loud
🤔 Common Struggles:

Children might get confused tracking tens and ones

👀 Signs of Understanding:

Ability to separate numbers and add systematically

🚀 Want More?

Extension Activities

  • Create a place value addition game
  • Practice with BibleMouse Math Worksheets
  • Explore addition on number line

Ready for Tomorrow?

Great job completing today's lesson!

Continue to Day 28 →Back to Math