aidemia--modules-lessonplan_request	Titles of parts of the lesson must be formatted as headings
What to create	Lesson plan
Which subject	Mathematics
What topic	Adding two three digit numbers.
What length (min)	30
What age group	Year or Grade 3
Include homework
Include images descriptions
Any other preferences

Lesson Plan: Adding Two Three-Digit Numbers

Subject: Mathematics
Grade Level: 3
Duration: 30 minutes
Topic: Adding Two Three-Digit Numbers

---

Objectives

• Students will understand how to add two three-digit numbers.
• Students will learn the importance of carrying over numbers during addition.
• Students will solve addition problems independently and with guidance.

Materials Needed

• Whiteboard and markers
• Worksheets with addition problems
• Pencils
• Manipulatives (optional, such as base-ten blocks)

Lesson Outline

Introduction (5 minutes)

• Begin by reviewing place value (hundreds, tens, and ones) with the students.
• Ask students to give examples of three-digit numbers.
• Explain that today, we will learn how to add two three-digit numbers.

Direct Instruction (10 minutes)

1. Demonstrate the Addition Process:

   • Write a problem on the whiteboard, e.g., 256 + 478.
   • Line up the numbers vertically, ensuring each digit is in the correct place (hundreds, tens, ones).

2. Step-by-Step Addition:

   • Add the Ones Place: 6 (from 256) + 8 (from 478) = 14.
     • Write down 4 and carry over 1 to the tens place.
   • Add the Tens Place: 5 (from 256) + 7 (from 478) + 1 (carry) = 13.
     • Write down 3 and carry over 1 to the hundreds place.
   • Add the Hundreds Place: 2 (from 256) + 4 (from 478) + 1 (carry) = 7.
     • Write down 7.

3. Final Answer:

   • Show students the final answer on the board: 256 + 478 = 734.

Guided Practice (10 minutes)

• Provide students with a worksheet containing similar problems, such as:

  1. 345 + 287
  2. 523 + 176
  3. 412 + 259

• Allow students to work in pairs to solve the problems.

• Walk around the classroom to provide assistance and check for understanding.

Independent Practice (3 minutes)

• Ask students to complete one more addition problem on their own:
  • 634 + 289

Conclusion (2 minutes)

• Review the steps of adding three-digit numbers.
• Highlight the importance of lining up numbers correctly and carrying over when needed.

Homework Assignment

• Complete the following problems:
  1. 421 + 378
  2. 507 + 286
  3. 634 + 149

Correct Answers

1. 421 + 378 = 799
2. 507 + 286 = 793
3. 634 + 149 = 783

---

Additional Notes

• Encourage students to check their work by adding the second number to the answer and verifying it equals the first number.
• Consider providing extra practice for students who grasp the concept quickly or additional support for those struggling with addition strategies.