# Counting Numbers From 1 To 170 Mathematics Primary 1 Third Term Lesson Notes Week 1

### 3rd Term Lesson Notes Primary 1 Age 6

**Subject** : Mathematics

**Topic** :

Counting Numbers from 1 To 170

**Class** : Basic 1 / Primary 1 / Grade 1

**Term** : Third Term

**Week** : Week 1

**Learning Objectives:**

- Count numbers from 1 to 170 accurately.
- Understand the concept of addition and its application to numbers from 1 to 170.
- Develop fluency in counting and adding two-digit numbers.
- Apply problem-solving strategies to solve addition problems effectively.
- Demonstrate understanding and accuracy in counting and adding numbers.

**Learning Outcomes:**

By the end of this lesson, students should be able to:

- Count numbers from 1 to 170 confidently and sequentially.
- Perform addition of two-digit numbers from 1 to 170 accurately.
- Apply appropriate strategies to solve addition problems involving two-digit numbers.
- Communicate and explain their thought processes in counting and adding numbers.

**Materials**:

- Number charts or number lines
- Addition flashcards or worksheets
- Manipulatives (e.g., base ten blocks, counters) for visual support (optional)
- Whiteboard and markers
- Individual whiteboards and markers (optional)
- Student notebooks

**Embedded Core Skills:**

- Numeracy skills: Students will develop their understanding of number sense, place value, counting, and addition skills.
- Critical thinking skills: Students will apply problem-solving strategies and reasoning to count and add numbers.
- Communication skills: Students will engage in discussions, share their solutions, and explain their thought processes.
- Fine motor skills: Students will use writing utensils to solve problems and record their answers

**Content **

Good morning, class! Today, we are going to learn about counting numbers from 1 to 170.

Let’s start by understanding what counting numbers are. Counting numbers are the numbers we use to count and arrange objects in order. They are also called natural numbers. So, when we count, we start with 1 and go all the way up to our desired number, which in this case is 170.

Now, let’s practice counting from 1 to 170 together. I will say the numbers out loud, and I want you all to repeat after me.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170.

Well done, everyone! We have successfully counted from 1 to 170.

Now, let’s talk a little bit about the numbers we encountered. You may have noticed that these numbers are increasing by one as we move from left to right. We call this a sequence of numbers.

The first number, 1, is the smallest counting number, and the last number, 170, is the largest number we are counting up to. All the numbers in between follow in order, with no numbers missing.

It’s important to remember that when counting, we should take our time and say each number clearly. This will help us avoid skipping any numbers and ensure that we count accurately.

So, practice

Evaluation

1. The first counting number is _______.

a) 0

b) 1

c) 2

2. The largest counting number between 1 and 170 is _______.

a) 169

b) 170

c) 171

3. The number that comes after 99 is _______.

a) 98

b) 100

c) 101

4. The number that comes before 70 is _______.

a) 68

b) 69

c) 71

5. The number that comes between 50 and 52 is _______.

a) 48

b) 51

c) 53

6. The number that comes after 149 is _______.

a) 150

b) 148

c) 151

7. The number that comes before 130 is _______.

a) 131

b) 129

c) 128

8. The number that comes between 90 and 92 is _______.

a) 91

b) 89

c) 93

9. The number that comes after 79 is _______.

a) 77

b) 80

c) 78

10. The number that comes before 160 is _______.

a) 161

b) 159

c) 158

### Addition and Subtraction of numbers from 1 To 170

Good morning, class! Today, we will be learning about addition and subtraction of two-digit numbers from 1 to 170.

Addition is the process of combining two or more numbers to find their total, while subtraction is the process of taking one number away from another to find the difference.

Let’s start with addition. When adding two-digit numbers, we need to remember the place value of each digit. The digit in the ones place represents the value of ones, while the digit in the tens place represents the value of tens.

For example, let’s take the addition problem: 34 + 26. We start by adding the numbers in the ones place, which gives us 4 + 6 = 10. Since 10 is a two-digit number, we write down the 0 in the ones place and carry the 1 to the tens place. Now, we add the numbers in the tens place, which gives us 1 (from the carry) + 3 + 2 = 6. So, the sum of 34 + 26 is 60.

Now, let’s move on to subtraction. When subtracting two-digit numbers, we also need to pay attention to the place value. The larger number comes first, and we subtract the smaller number from it.

For example, let’s take the subtraction problem: 82 – 47. We start by subtracting the numbers in the ones place, which gives us 2 – 7. Since 2 is smaller than 7, we need to borrow 1 from the tens place. We change the 8 to 7 and add 10 to 2, which gives us 12 – 7 = 5. Now, we subtract the numbers in the tens place, which gives us 7 – 4 = 3. So, the difference of 82 – 47 is 35.

Remember, it’s important to line up the digits properly and carry or borrow when necessary to solve addition and subtraction problems accurately.

Now, let’s practice some addition and subtraction problems together. I will write a few problems on the board, and I want you to solve them individually. Raise your hand when you’re finished, and we will go over the solutions together.

1. 48 + 25

2. 92 – 57

3. 63 + 19

4. 125 – 87

Take your time, use the strategies we discussed, and do your best.

### Lesson Plan Presentation: Counting Numbers from 1 to 170 and Addition of Numbers from 1 to 170

Introduction (5 minutes):

- Greet the class and briefly recap the previous lesson on counting numbers from 1 to 170.
- State the learning objectives for the current lesson on addition of numbers from 1 to 170.
- Activate prior knowledge by asking students to count from 1 to 170 together as a class.

Presentation (10 minutes):

- Display a number chart or number line on the board.
- Review counting from 1 to 100 and guide students to count from 100 to 170.
- Explain the concept of addition and its purpose in combining numbers.
- Use visual aids, such as manipulatives or drawings, to demonstrate simple addition problems.
- Show examples of addition sentences (e.g., 5 + 3 = 8) and explain the meaning of each component.

Teacher’s Activities (15 minutes):

- Introduce the addition symbol (+) and its purpose in mathematical operations.
- Model addition problems on the board, starting with single-digit numbers, then progressing to two-digit numbers within 1 to 9.
- Demonstrate the regrouping process when the sum exceeds 9 in the ones place.
- Provide step-by-step explanations while solving addition problems, emphasizing the importance of aligning digits correctly

Learners’ Activities (15 minutes):

- Distribute individual whiteboards and markers or provide notebooks for students to solve addition problems.
- Instruct students to solve the given addition problems independently, starting with simple two-digit numbers within 1 to 9.
- Encourage students to use visual aids, such as drawings or manipulatives, to support their understanding.
- Allow students to share their solutions and explanations with the class.

Assessment:

- Observe students’ participation and engagement during the learners’ activities.
- Circulate around the classroom, providing assistance and guidance as needed.
- Review students’ solutions and check for accuracy and understanding of addition concepts.

Evaluation Questions:

- What is the purpose of addition in mathematics?
- Can you count from 1 to 170 accurately?
- Solve the addition problem: 12 + 7.
- Explain the regrouping process when adding two-digit numbers.
- Add the numbers 35 and 29.
- How do you write the addition sentence for the sum of 15 and 8?
- Solve the addition problem: 64 + 26.
- Can you count backward from 170 to 1?
- What is the largest two-digit number we have counted so far?
- Solve the addition problem: 89 + 22.

Conclusion (5 minutes):

- Summarize the key points covered in the lesson, emphasizing the importance of accurate counting and understanding addition concepts.
- Review the strategies used to add two-digit numbers and the regrouping process when necessary.
- Provide positive feedback and acknowledge students’ efforts in counting and adding numbers.
- Encourage students to practice counting and adding numbers at home to strengthen their skills.

Note: Differentiation strategies can be implemented throughout the lesson to accommodate students with varying abilities. Provide extra support or enrichment activities as needed, such as using manipulatives, number charts, or individual whiteboards for visual learners. Additionally, adjust the complexity of the addition problems based on individual student readiness