Addition of Two 2-Digit Numbers without Exchanging or Renaming Mathematics Primary 2 Second Term Lesson Notes Week 2

Subject: Mathematics
Class: Primary 2
Term: Second Term
Week: 2
Age: 7-8 years
Topic: Addition of Two 2-Digit Numbers without Exchanging or Renaming
Sub-topic: Counting, Writing Numbers, Addition of 2-Digit Numbers
Duration: 40 minutes

Behavioural Objectives:

By the end of the lesson, pupils should be able to:

• Count numbers from 450 to 470 and 1 to 470
• Write numbers 450 to 470 and 1 to 470 in numerals and words
• Add two 2-digit numbers without exchanging or renaming
• Relate addition to real-life experiences (e.g., adding the sum of items purchased in a shop)
• Solve real-life problems involving the addition of two 2-digit numbers
• Write numbers in expanded form (e.g., 969 = 900 + 60 + 9)
• Solve addition problems using beads and cards
• Tell addition stories and solve them in groups

Keywords:

• Addition
• 2-digit numbers
• Counting
• Expanded form
• Numerals
• Real-life problems
• Beads
• Cards

Set Induction:

Start by sharing a short story about going to a shop and adding up the total cost of items purchased. Show the children how this type of addition can help in real life. Use visual aids like a number chart from 450 to 470 to engage the pupils.

Entry Behaviour:

Pupils are expected to already know how to count up to 100, perform basic addition, and understand the concept of numbers in expanded form.

Learning Resources and Materials:

• Flashcards
• Beads and cards for hands-on learning
• Number chart (1-470)
• A deck of cards for group activities
• Chart for expanded form of numbers

Building Background/Connection to Prior Knowledge:

The pupils will recall their knowledge of counting and addition from previous lessons. They should have already practiced adding smaller numbers, and this lesson will build on that foundation.

Embedded Core Skills:

• Problem-solving
• Communication and collaboration
• Digital Literacy
• Creativity and imagination
• Leadership and Personal Development
• Citizenship

Learning Materials:

• Flashcards
• Beads
• Cards
• Chart for expanded form

Reference Books:

• Lagos State Scheme of Work
• Mathematics Textbook for Primary Schools

Instructional Materials:

• Number chart (1-470)
• Flashcards for numeral and word comparison
• Beads and cards for hands-on activities

Content:

1. Counting Numbers (450-470 and 1-470):

• Count numbers aloud and individually from 450 to 470 and 1 to 470.
• Practice writing numbers from 450 to 470 and 1 to 470 in numerals and words.

2. Writing Numbers in Expanded Form:

• Explain expanded form and how to break numbers into hundreds, tens, and ones.
  Example: 969 = 900 + 60 + 9
• Practice with other numbers like 256 = 200 + 50 + 6.

3. Addition of Two 2-Digit Numbers Without Exchanging or Renaming:

• Demonstrate the addition of two 2-digit numbers by breaking them into tens and ones.
  Example:
  41 + 25 = 66
  (40 + 1) + (20 + 5) = 60 + 6 = 66

4. Real-Life Problem Solving:

• Use real-life examples like adding the total cost of items in a shop or counting how many boys and girls are in a class.

5. Hands-On Activities:

• Pupils use beads and cards to add two numbers together.
• Pupils in small groups use a deck of cards, pick two cards, and add the numbers together.

Evaluation Questions (15 fill-in-the-blank questions):

1. The number that comes after 459 is __________.
   a) 460
   b) 461
   c) 470
   d) 450
2. 41 + 25 = __________.
   a) 66
   b) 65
   c) 60
   d) 70
3. The expanded form of 256 is __________.
   a) 200 + 50 + 6
   b) 250 + 6
   c) 200 + 6
   d) 250 + 50
4. What is 55 + 23?
   a) 78
   b) 75
   c) 80
   d) 90
5. The number that comes before 467 is __________.
   a) 468
   b) 460
   c) 465
   d) 466
6. 41 + 15 = __________.
   a) 56
   b) 55
   c) 60
   d) 50
7. What is the expanded form of 912?
   a) 900 + 10 + 2
   b) 900 + 2
   c) 900 + 100
   d) 90 + 12
8. 63 + 15 = __________.
   a) 78
   b) 79
   c) 80
   d) 75
9. The number after 469 is __________.
   a) 470
   b) 450
   c) 460
   d) 480
10. What is 35 + 24?
    a) 60
    b) 59
    c) 55
    d) 61
11. 20 + 41 = __________.
    a) 61
    b) 62
    c) 60
    d) 59
12. The number before 470 is __________.
    a) 469
    b) 460
    c) 465
    d) 440
13. The sum of 49 + 32 is __________.
    a) 81
    b) 82
    c) 85
    d) 83
14. 53 + 31 = __________.
    a) 84
    b) 85
    c) 86
    d) 87
15. The expanded form of 650 is __________.
    a) 600 + 50
    b) 600 + 5
    c) 60 + 50
    d) 600 + 60

Class Activity Discussion (15 FAQs with answers):

1. What is the expanded form of a number?
   It shows how a number is broken into hundreds, tens, and ones. Example: 456 = 400 + 50 + 6.
2. How do we add two 2-digit numbers without exchanging?
   We add the tens first, then the ones. For example: 41 + 25 = (40 + 1) + (20 + 5) = 60 + 6 = 66.
3. What happens when we add numbers in real life?
   We can add things like the number of apples, or the cost of items in a store, to find a total.
4. Can we use cards to add numbers?
   Yes, by picking two cards and adding the numbers shown on them.
5. What do we do if the numbers are bigger than 10?
   We break them into tens and ones and add them separately.
6. How do we count numbers between 450 and 470?
   We start from 450 and continue counting upwards by one each time.
7. How does expanded form help us understand numbers?
   It shows us the value of each digit in a number.
8. What is the sum of 41 and 20?
   It is 61.
9. Why is counting important in our daily lives?
   Counting helps us keep track of things, like how many apples we have or how many steps we walk.
10. Can we add three numbers together?
    Yes, we can add three 2-digit numbers without renaming or exchanging.
11. What is the sum of 55 and 15?
    It is 70.
12. How do we write numbers in words?
    We write 450 as “four hundred and fifty.”
13. Can we add numbers like 100 + 50 + 6?
    Yes, that’s an example of expanded form: 156 = 100 + 50 + 6.
14. What is a real-life example of addition?
    Adding up the total amount of money you spend when shopping.
15. How can we solve addition problems with beads?
    We can represent each number with beads and then count them together.

Teacher’s Activities:

1. Revise the numbers from 450 to 470 with the pupils.
2. Demonstrate writing numbers in words and numerals.
3. Use real-life examples like shopping to demonstrate addition.
4. Lead the class in expanding numbers into hundreds, tens, and ones.
5. Engage students in hands-on activities using beads and cards to add numbers.

Learners’ Activities:

1. Count aloud from 450 to 470 and 1 to 470.
2. Write numbers in numerals and words.
3. Add two 2-digit numbers without exchanging or renaming.
4. Solve real-life addition problems.
5. Participate in group activities, using beads and cards to add numbers.

Assessment:

1. Write the expanded form of 234.
2. What is the sum of 53 and 21?
3. Count from 1 to 470.
4. Add 41 and 35.
5. Solve: 63 + 14.
6. Identify the number before 470.
7. What is 62 + 33?
8. Solve real-life problem: Add the cost of two items, 30 and 45.
9. Add 22 + 18.
10. Write the number 365 in words.

Conclusion:

The teacher will review the activities with the students, providing feedback and ensuring they understand how to add 2-digit numbers without exchanging or renaming. They will also reinforce real-life applications of addition and encourage more practice in groups.