Addition of Two Digit Numbers Under Tens and Units With and Without Regrouping Mathematics Primary 3 First Term Lesson Notes Week 8
Mathematics Lesson Plan for Primary 3
Subject: Mathematics
Class: Primary 3
Term: First Term
Week: 8
Age: 8 years
Topic: Addition of Whole Numbers
Sub-topic: Addition of 2-Digit and 3-Digit Numbers
Duration: 60 minutes
Behavioural Objectives:
By the end of the lesson, pupils should be able to:
- Identify numbers from 401-700.
- Order numbers from 1-700.
- Count from 1-700.
- Write numbers from 400-700 in numerals and words.
- Skip count by 6s, 7s, and 9s.
- Add two 2-digit numbers with or without exchanging or renaming.
- Add three 2-digit numbers taking two at a time.
- Solve real-life problems involving addition.
Keywords:
- Addition
- 2-Digit Numbers
- 3-Digit Numbers
- Exchanging
- Renaming
Set Induction:
The teacher will use number cards to demonstrate addition of 2-digit and 3-digit numbers, including carrying over.
Entry Behaviour:
Pupils should be familiar with basic addition and counting of numbers.
Learning Resources and Materials:
- Number cards
- Whiteboard and markers
- Counters
- Addition worksheets
Building Background/Connection to Prior Knowledge:
Pupils have previously learned about counting, writing numbers, and basic addition, which will be expanded to include more complex addition problems.
Embedded Core Skills:
- Numeracy
- Problem-solving
- Attention to detail
Learning Materials:
- Mathematics Textbook
- Workbooks
Reference Books:
- Lagos State Scheme of Work
- Mathematics Textbook for Primary 3
Instructional Materials:
- Number cards
- Whiteboard and markers
- Addition worksheets
Content:
- Identifying and Writing Numbers 401-700:
- Recite and write numbers from 401 to 700 in numerals and words.
- Addition of 2-Digit Numbers:
- Add two 2-digit numbers without exchanging (e.g., 23 + 15).
- Add two 2-digit numbers with exchanging (e.g., 47 + 68).
- Addition of 3-Digit Numbers:
- Add two 3-digit numbers with exchanging (e.g., 125 + 236).
- Add three 2-digit numbers taking two at a time (e.g., 34 + 45 + 27).
- Real-Life Problems:
- Solve problems related to buying and selling items, exchange rates, and banking (e.g., if you buy items costing 45 and 67 naira, how much do you pay in total?).
Evaluation
- 45 + 28 = __.
a) 63
b) 73
c) 68
d) 78 - 127 + 233 = __.
a) 360
b) 350
c) 370
d) 390 - 56 + 17 = __.
a) 73
b) 72
c) 80
d) 70 - 348 + 125 = __.
a) 473
b) 453
c) 455
d) 475 - 234 + 321 = __.
a) 555
b) 544
c) 565
d) 545 - Add 23 + 34 + 12. The total is __.
a) 67
b) 69
c) 68
d) 70 - 492 + 208 = __.
a) 700
b) 690
c) 710
d) 680 - What is the sum of 145 and 156?
a) 301
b) 311
c) 306
d) 321 - 89 + 45 = __.
a) 134
b) 144
c) 123
d) 130 - 236 + 118 = __.
a) 354
b) 348
c) 356
d) 368 - 55 + 29 = __.
a) 84
b) 85
c) 74
d) 86 - 321 + 654 = __.
a) 975
b) 986
c) 964
d) 980 - Add 111 and 234. The result is __.
a) 355
b) 345
c) 365
d) 336 - 86 + 49 = __.
a) 125
b) 126
c) 135
d) 124 - 409 + 291 = __.
a) 700
b) 710
c) 690
d) 699
Class Activity Discussion
- Q: What does it mean to add numbers with exchanging or renaming?
A: It means carrying over when the sum of digits in a column exceeds 10. - Q: How do you add two 2-digit numbers without exchanging?
A: Simply add the digits in each place value and write the sum directly (e.g., 23 + 15 = 38). - Q: What is the first step in adding 3-digit numbers with exchanging?
A: Start by adding the digits in the units place, carry over if necessary, and then add the tens and hundreds places. - Q: How do you add 34 + 45 + 27?
A: Add 34 and 45 first to get 79, then add 27 to get 106. - Q: What is the importance of addition in daily life?
A: It helps in activities like buying and selling items, managing money, and solving practical problems. - Q: How do you write the number 450 in words?
A: Four hundred and fifty. - Q: How do you add numbers with carrying over?
A: Add the digits in each column starting from the right, carry over if the sum is 10 or more. - Q: What is the sum of 125 and 236?
A: 361. - Q: How do you solve addition problems in real-life situations?
A: Break down the problem into smaller parts, use addition to find totals, and apply the result to the situation. - Q: How can addition be used in banking?
A: For calculating deposits, withdrawals, and account balances. - Q: What is the result of 23 + 34?
A: 57. - Q: How do you add two 3-digit numbers?
A: Add each digit in the corresponding place value, carrying over if needed. - Q: What is the sum of 145 and 156?
A: 301. - Q: How do you handle large numbers in addition?
A: Use place value and carry over if necessary, just like with smaller numbers. - Q: What is the sum of 86 and 49?
A: 135.
Presentation:
Step 1:
The teacher revises the addition of 2-digit and 3-digit numbers with and without exchanging.
Step 2:
The teacher introduces the new topic by demonstrating addition problems using number cards and examples.
Step 3:
The teacher allows pupils to practice addition problems and solves real-life problems involving addition. Corrections and guidance are provided as needed.
Teacher’s Activities:
- Demonstrate addition with and without exchanging.
- Guide pupils in solving problems.
- Provide exercises for practice.
Learners’ Activities:
- Practice adding 2-digit and 3-digit numbers.
- Solve real-life addition problems.
- Complete exercises in workbooks.
Assessment:
- Evaluate pupils’ ability to add numbers with and without exchanging.
- Review pupils’ solutions to real-life problems.
Ten Evaluation Questions:
- Add 56 and 17.
- What is the sum of 234 and 321?
- Write 462 in words.
- How do you add 78 and 89?
- Solve 123 + 456.
- What is 345 + 123?
- Add 67, 89, and 23.
- What is the result of 512 + 289?
- Solve 198 + 265.
- What is the sum of 435 and 562?
Conclusion:
The teacher reviews pupils’ work, provides feedback, and clarifies any misunderstandings about addition. Pupils are encouraged to apply addition skills in real-life scenarios.