Numbers 101-110 & Addition Facts – Basic 1 Mathematics Lesson Note (Second Term)

Subject: Mathematics
Class: Primary 1
Topic: Numbers 101-110 & Addition Facts
Duration: 30 minutes

Learning Objectives

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

• Count and identify numbers from 101 to 110
• Understand numbers beyond 100
• Practice addition with the new number range

1. Introduction to numbers 101-110

Numbers Beyond 100: After 100 comes 101, then 102, and so on.

Let’s Learn 101 to 110: 

101 – ONE HUNDRED AND ONE 

102 – ONE HUNDRED AND TWO 

103 – ONE HUNDRED AND THREE 

104 – ONE HUNDRED AND FOUR 

105 – ONE HUNDRED AND FIVE 

106 – ONE HUNDRED AND SIX 

107 – ONE HUNDRED AND SEVEN 

108 – ONE HUNDRED AND EIGHT 

109 – ONE HUNDRED AND NINE 

110 – ONE HUNDRED AND TEN

Exercise 1: Count from 101 to 110: 101, 102, 103, 104, 105, 106, 107, 108, 109, 110

Exercise 2: What comes next?

1. 100, 101, ___
2. 105, 106, ___
3. 108, 109, ___
4. 102, 103, ___

Exercise 3: Fill in the missing numbers:

1. 101, 102, ___, 104, ___
2. 105, ___, 107, ___, 109
3. 103, 104, ___, 106, ___

2. Writing numbers 101-110

How to Write Numbers 101-110:

Exercise 4: Trace these numbers: 101 101 101 102 102 102 103 103 103 104 104 104 105 105 105

Exercise 5: Trace these numbers: 106 106 106 107 107 107 108 108 108 109 109 109 110 110 110

Exercise 6: Write these numbers:

1. One hundred and three: ___
2. One hundred and seven: ___
3. One hundred and ten: ___
4. One hundred and five: ___

Exercise 7: Complete the sequence: 100, ___, 102, ___, 104, ___, 106, ___, 108, ___, 110

3. Addition with numbers 101-110

Adding with Hundreds: When we add to numbers over 100, we follow the same rules.

Simple Addition:

• 100 + 1 = 101
• 100 + 5 = 105
• 100 + 10 = 110
• 101 + 1 = 102

Exercise 8: Add these numbers:

1. 100 + 2 = ___
2. 100 + 6 = ___
3. 100 + 9 = ___
4. 100 + 4 = ___
5. 100 + 8 = ___

Exercise 9: Complete the addition:

1. 101 + 1 = ___
2. 102 + 1 = ___
3. 103 + 1 = ___
4. 104 + 1 = ___
5. 105 + 1 = ___

Exercise 10: Add to get numbers 101-110:

1. 100 + ___ = 103
2. 100 + ___ = 107
3. 100 + ___ = 110
4. 100 + ___ = 105

Exercise 11: What is the sum?

1. 102 + 2 = ___
2. 101 + 3 = ___
3. 103 + 2 = ___
4. 106 + 1 = ___

4. Counting and addition practice

Counting Forward:

Exercise 12: Count from 98 to 110: 98, 99, 100, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___

Exercise 13: What number comes before?

1. ___, 102
2. ___, 106
3. ___, 110
4. ___, 105

Exercise 14: What number comes after?

1. 101, ___
2. 107, ___
3. 104, ___
4. 109, ___

Exercise 15: Addition word problems:

1. I have 100 marbles. I get 3 more marbles. How many marbles do I have now? 100 + 3 = ___
2. There are 100 books in the library. 7 more books are added. How many books are there now? 100 + 7 = ___
3. A farmer has 100 chickens. He buys 5 more chickens. How many chickens does he have? 100 + 5 = ___

Exercise 16: Match the addition to the answer:

• 100 + 4 → 108
• 100 + 8 → 106
• 100 + 6 → 104
• 100 + 2 → 102

Exercise 17: True or False:

1. 100 + 9 = 109 ___
2. 100 + 3 = 104 ___
3. 100 + 10 = 110 ___
4. 100 + 1 = 101 ___

Homework

1. Practice counting from 100 to 110 five times
2. Write numbers 101-110 three times each
3. Practice adding 100 + any number from 1-10
4. Find examples of numbers over 100 around your home
5. Count objects and see if you can make groups of over 100

Teacher: Use base-10 blocks or hundreds charts to help pupils visualize numbers beyond 100