Addition of 1-digit and 2-digit Numbers Mathematics Primary 1 Second Term Lesson Notes Week 5

Mathematics Primary 1 Second Term Lesson Notes Week 5

Subject: Mathematics
Class: Primary 1
Term: Second Term
Week: Week 5
Age: 6-7 years
Topic: Introduction to Math Facts: Addition of Numbers
Sub-topic: Addition of 1-digit and 2-digit numbers
Duration: 40 minutes

Behavioral Objectives:

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

1. Identify numbers from 1 to 110.
2. Count from 1 to 110 in order.
3. Write numbers from 1 to 110 in numerals.
4. Explain the term “addition.”
5. Add two whole numbers with a sum not greater than 20.
6. Write simple math equations (e.g., 10+8=, 11+5=?).
7. Identify fact families in addition (e.g., 4+6=10, 6+4=10).
8. Skip count in 2s, 3s, and 10s.
9. Apply the addition of single-digit and two-digit numbers to real-life situations.
10. Solve quantitative reasoning problems related to addition.
11. Find missing addends in open sentences within 20 (e.g., 7+?=12).

Keywords:

• Addition
• Sum
• Addend
• Fact families
• Skip counting
• Numerals
• Equation

Set Induction:

1. Begin by asking the students to recall any addition problems they know.
2. Show them a simple addition equation on the board (e.g., 3+4=7).
3. Introduce the importance of adding numbers, explaining that addition helps us find out how many things there are when we group them together.
4. Ask students to count some items (e.g., pencils) to reinforce counting and addition.

Entry Behavior:

Students should already be able to count from 1 to 50 and understand simple counting and number writing. This lesson will build on that foundation by introducing addition and counting to 110.

Learning Resources and Materials:

• Flashcards with numbers 1-110
• Counting objects (e.g., pencils, blocks, or counters)
• Whiteboard and markers
• Playing cards with numbers (for hands-on practice)
• Number chart (1-110)

Building Background/Connection to Prior Knowledge:

Students have previously learned how to count, write numbers up to 50, and perform basic addition using objects. They will now extend their knowledge to numbers up to 110 and apply addition to simple 1-digit and 2-digit numbers.

Embedded Core Skills:

• Communication and Collaboration: Working in pairs or small groups to solve addition problems.
• Critical Thinking and Problem Solving: Using counting objects to solve addition problems and finding missing addends.
• Student Leadership and Personal Development: Encouraging students to take turns solving problems in front of the class.

Learning Materials:

• Flashcards
• Playing cards for addition practice
• Number charts
• Objects for counting (e.g., blocks, beans, etc.)

Reference Books:

• Lagos State Scheme of Work
• Primary 1 Mathematics Textbooks

Instructional Materials:

• Flashcards with numbers from 1 to 110
• A number chart for counting
• Objects for hands-on practice (e.g., blocks, balls)

Content:

1. Addition:
   • Addition means putting two or more numbers together to get a total.
   • For example, 4 + 5 = 9 means if you have 4 objects and then get 5 more, you will have 9 objects in total.
   • The numbers we add are called addends, and the result is called the sum.
   • Fact Families: Fact families show the relationship between numbers in an addition equation. For example, 4 + 6 = 10 and 6 + 4 = 10 are part of the same fact family.
2. Numbers from 1 to 110:
   • Numbers from 1 to 110 will be reviewed by counting forward and backward.
   • Students will practice skip counting by 2s, 3s, and 10s. For example, starting from 1:
     • Skip counting by 2s: 2, 4, 6, 8, 10…
     • Skip counting by 3s: 3, 6, 9, 12, 15…
     • Skip counting by 10s: 10, 20, 30, 40, 50…

Evaluation Questions:

1. What is 5 + 3?
   (a) 7
   (b) 8
   (c) 9
   (d) 10
2. What is 6 + 4?
   (a) 11
   (b) 9
   (c) 10
   (d) 12
3. What is the sum of 9 + 8?
   (a) 17
   (b) 18
   (c) 16
   (d) 19
4. If you have 4 apples and add 6 more, how many apples do you have?
   (a) 10
   (b) 8
   (c) 9
   (d) 12
5. What is 7 + 5?
   (a) 12
   (b) 11
   (c) 10
   (d) 9
6. What number comes after 99?
   (a) 100
   (b) 101
   (c) 102
   (d) 98
7. If 8 + 5 = ?, what is the missing number?
   (a) 13
   (b) 12
   (c) 14
   (d) 15
8. What is the sum of 12 + 6?
   (a) 18
   (b) 16
   (c) 14
   (d) 13
9. Skip count by 3 starting from 3. What is the next number after 9?
   (a) 12
   (b) 10
   (c) 11
   (d) 14
10. Which of these is an addition equation?
    (a) 3 – 2 = 1
    (b) 4 + 5 = 9
    (c) 6 x 3 = 18
    (d) 8 ÷ 4 = 2

Presentation Structure:

Step 1: Revision of the Previous Topic

• Review counting from 1 to 50 and simple addition with smaller numbers.
• Ask students to recall and write down some addition equations they know.

Step 2: Introduction of the New Topic

• Introduce the concept of addition with numbers up to 110.
• Discuss simple addition equations like 10 + 8 = ? and identify the addends and sum.

Step 3: Student Contributions and Corrections

• Allow students to participate by solving addition problems on the board and explaining their solutions.
• Provide corrections where necessary to ensure accuracy.

Teacher’s Activities:

1. Present numbers 1-110 using flashcards and number charts.
2. Explain the concept of addition and fact families.
3. Use objects to demonstrate addition by physically adding items together.
4. Guide students in skip counting by 2s, 3s, and 10s.

Learners’ Activities:

1. Count forward and backward from 1 to 110.
2. Solve addition problems on their own and in pairs.
3. Skip count by 2s, 3s, and 10s.
4. Participate in class discussions and solve addition equations.

Assessment:

Provide 10 short-answer questions related to addition, writing numbers, and skip counting.

Conclusion:

• Review what students have learned by going over the main points of the lesson.
• Go around the class to mark work, provide feedback, and answer any lingering questions.