Add up to four two-digit numbers using place value and properties of operations

📘 Lesson Plan

Subject: Mathematics
Grade: II
Duration: 2 weeks (10 days)
Topic: Add up to four two-digit numbers using place value and properties of operations

 

🎯 Learning Objectives:

By the end of this unit, students will be able to:

  • Add up to four two-digit numbers correctly.
  • Use place value strategies (tens and ones) to solve addition.
  • Understand and apply the commutative and associative properties of addition.
  • Solve real-life word problems involving addition.

 

📅 Week 1

🟩 Day 1: Introduction & Place Value Review

  • Revise place value: tens and ones.
  • Use place value charts to represent numbers (e.g., 23 = 2 tens + 3 ones).
  • Activity: Use number cards or base ten blocks to build numbers.
  • Materials: Place value chart, number cards, base ten blocks.

 

🟩 Day 2: Adding two two-digit numbers (without regrouping)

  • Demonstrate adding numbers step by step: add ones first, then tens.
  • Example: 21 + 32.
  • Practice with 4–5 simple sums.
  • Activity: Children solve sums using place value charts.

 

🟩 Day 3: Adding two two-digit numbers (with regrouping)

  • Teach regrouping when ones sum is more than 10.
  • Example: 28 + 17.
  • Use base ten blocks to show regrouping visually.
  • Practice sums with regrouping.

 

🟩 Day 4: Adding three two-digit numbers

  • Show step by step: add first two numbers, then add the third.
  • Example: 12 + 25 + 31.
  • Use place value to guide addition.
  • Practice sums (with and without regrouping).

 

🟩 Day 5: Adding four two-digit numbers

  • Show how to add four numbers: (12+13) + (14+11).
  • Teach students to group numbers to make addition easier.
  • Practice at least 4–5 sums.
  • Activity: Pair work to solve sums on mini whiteboards.

 

📅 Week 2

🟩 Day 6: Commutative Property (Changing order)

  • Explain: numbers can be added in any order, result stays the same.
  • Example: 12+15+20+13 = 20+12+13+15.
  • Activity: Use number cards, ask students to rearrange and add.

 

🟩 Day 7: Associative Property (Changing grouping)

  • Explain: numbers can be grouped differently.
  • Example: (12+15)+20 = 12+(15+20).
  • Activity: Show grouping on the board and check that the sum stays the same.
  • Practice sums with grouping.

 

🟩 Day 8: Word Problems / Real-life examples

  • Discuss scenarios: “Four friends collect stickers: 12, 15, 17, and 16. How many in total?”
  • Students write numbers, use place value to solve.
  • Activity: Ask students to create their own word problems.

 

🟩 Day 9: Practice & Quiz

  • Quick quiz: 5–6 addition sums (up to four two-digit numbers).
  • Group activity: create sums, swap with classmates, and solve.
  • Revise place value and properties.

 

🟩 Day 10: Revision & Assessment

  • Oral revision of concepts.
  • Short written test: 3 sums, 1 word problem, and 2 property questions.
  • Discuss answers and correct together.

 

🧩 Teaching Methods & Activities:

  • Use of place value charts
  • Hands-on manipulatives (base ten blocks, number cards)
  • Pair and group activities
  • Word problem creation
  • Quiz and games

 

📌 Assessment:

  • Daily worksheets
  • Oral questions
  • Group work observation
  • End-of-topic written test

 

🪄 Materials Needed:

  • Place value charts
  • Number cards / flashcards
  • Base ten blocks
  • Whiteboard and markers
  • Worksheets