Mathematics for Primary One – First Term according to the Ministry of Education scheme of work.
📘 Mathematics – Primary One
First Term Expanded Lesson Notes (Week 1–12)
Week 1: Numbers 1 – 20
Numbers are used for counting, writing, and identifying things.
Numbers from 1 to 20 are:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20.
We count objects one by one.
Example:
🍎🍎🍎 = 3 apples.
🍌🍌🍌🍌🍌 = 5 bananas.
Class Exercise
1. Write numbers from 1 to 20 in your book.
2. Count and write: 🍎🍎🍎🍎🍎🍎 = ?
Week 2: Writing Numbers in Words (1 – 10)
Numbers can be written in figures (1, 2, 3…) or in words.
Examples:
1 = One
2 = Two
3 = Three
4 = Four
5 = Five
6 = Six
7 = Seven
8 = Eight
9 = Nine
10 = Ten
Class Exercise
1. Write in words: 6, 8, 10.
2. Write in figures: Seven, Nine.
Week 3: Writing Numbers in Words (11 – 20)
11 = Eleven
12 = Twelve
13 = Thirteen
14 = Fourteen
15 = Fifteen
16 = Sixteen
17 = Seventeen
18 = Eighteen
19 = Nineteen
20 = Twenty
Class Exercise
1. Write in words: 13, 15, 18.
2. Write in figures: Fourteen, Seventeen.
Week 4: Comparing Numbers (1 – 20)
When we compare, we find which number is greater (bigger) or smaller.
Example:
5 is less than 8 → 5 < 8
9 is greater than 6 → 9 > 6
Equal numbers are written as “=”
Example: 7 = 7
Class Exercise
1. Write using > or <: 12 ___ 15.
2. Write using =: 8 ___ 8.
Week 5: Addition of Numbers (1 – 10)
Addition means “putting together.”
Sign of addition is +.
Example:
2 + 3 = 5 (two plus three equals five).
🍎🍎 + 🍎🍎🍎 = 5 apples.
Class Exercise
1. 4 + 2 = ?
2. 1 + 5 = ?
Week 6: Addition of Numbers (11 – 20)
We can also add numbers up to 20.
Example:
10 + 5 = 15
7 + 8 = 15
Addition can be done with objects or number lines.
Class Exercise
1. 12 + 4 = ?
2. 8 + 7 = ?
Week 7: Subtraction of Numbers (1 – 10)
Subtraction means “taking away.”
Sign of subtraction is –.
Example:
5 – 2 = 3 (take 2 away from 5, we get 3).
🍌🍌🍌🍌🍌 – 🍌🍌 = 🍌🍌🍌 (3 bananas left).
Class Exercise
1. 7 – 3 = ?
2. 9 – 1 = ?
Week 8: Subtraction of Numbers (11 – 20)
Example:
15 – 5 = 10
18 – 7 = 11
We subtract by counting down.
Class Exercise
1. 20 – 8 = ?
2. 14 – 6 = ?
Week 9: Shapes
Shapes are forms of objects.
Examples of shapes:
1. Circle ⚪ (like a ball).
2. Square ⬛ (like a box).
3. Triangle 🔺 (like a slice of bread).
4. Rectangle ▭ (like a book).
Class Exercise
1. Draw a circle and a square.
2. Name two objects that are round.
Week 10: Length – Long and Short
We can compare objects by their length.
A pencil may be long or short.
Example:
Rope A = Long
Rope B = Short
Class Exercise
1. Which is longer: a broom or a pencil?
2. Which is shorter: your ruler or your desk?
Week 11: Mass (Heavy and Light)
Mass means how heavy or light something is.
Example:
A stone is heavy.
A feather is light.
Class Exercise
1. Which is heavier: a book or a leaf?
2. Which is lighter: a bag of rice or an orange?
Week 12: Revision and Examination
Revision means going over all the topics we have learnt.
Examination is a test of what we know.
Class Exercise
1. What does addition mean?
2. Write the numbers from 1 – 20.
📘 Mathematics – Primary One (First Term)
40 Multiple Choice Questions and Answers
Week 1: Numbers 1 – 20
1. Which number comes after 7?
a) 6
b) 8
c) 9
d) 10
Answer: b (8)
2. Which number comes before 15?
a) 16
b) 13
c) 14
d) 12
Answer: c (14)
3. Count the apples 🍎🍎🍎🍎. How many are they?
a) 2
b) 3
c) 4
d) 5
Answer: c (4)
4. Which number is the biggest?
a) 12
b) 18
c) 10
d) 6
Answer: b (18)
Week 2: Numbers in Words (1–10)
5. The number “6” in words is ____.
a) Seven
b) Six
c) Eight
d) Nine
Answer: b (Six)
6. The word “Three” is written in figures as ____.
a) 2
b) 4
c) 3
d) 5
Answer: c (3)
7. Which of these means “Ten”?
a) 8
b) 9
c) 10
d) 11
Answer: c (10)
8. “Five” is written in figures as ____.
a) 4
b) 5
c) 6
d) 7
Answer: b (5)
Week 3: Numbers in Words (11–20)
9. The number 12 in words is ____.
a) Twenty
b) Fifteen
c) Twelve
d) Ten
Answer: c (Twelve)
10. “Seventeen” in figures is ____.
a) 15
b) 16
c) 17
d) 18
Answer: c (17)
11. The number 19 in words is ____.
a) Eighteen
b) Nineteen
c) Fifteen
d) Twenty
Answer: b (Nineteen)
12. “Fourteen” in figures is ____.
a) 13
b) 14
c) 15
d) 16
Answer: b (14)
Week 4: Comparing Numbers
13. Which is greater: 9 or 6?
a) 6
b) 9
c) Both
d) None
Answer: b (9)
14. Which is smaller: 11 or 15?
a) 11
b) 15
c) Both equal
d) None
Answer: a (11)
15. 7 = ____.
a) 6
b) 8
c) 7
d) 9
Answer: c (7)
16. 18 ____ 12 (fill with > or <).
a) <
b) >
c) =
d) None
Answer: b (>)
Week 5: Addition (1–10)
17. 2 + 3 = ____.
a) 4
b) 5
c) 6
d) 7
Answer: b (5)
18. 4 + 1 = ____.
a) 3
b) 5
c) 6
d) 2
Answer: b (5)
19. 5 + 2 = ____.
a) 6
b) 7
c) 8
d) 9
Answer: b (7)
20. 7 + 3 = ____.
a) 9
b) 10
c) 11
d) 12
Answer: b (10)
Week 6: Addition (11–20)
21. 12 + 4 = ____.
a) 15
b) 16
c) 17
d) 18
Answer: b (16)
22. 10 + 7 = ____.
a) 16
b) 17
c) 18
d) 19
Answer: b (17)
23. 8 + 9 = ____.
a) 16
b) 17
c) 18
d) 19
Answer: b (17)
24. 15 + 3 = ____.
a) 18
b) 19
c) 20
d) 17
Answer: a (18)
Week 7: Subtraction (1–10)
25. 9 – 4 = ____.
a) 4
b) 5
c) 6
d) 7
Answer: b (5)
26. 7 – 2 = ____.
a) 4
b) 5
c) 6
d) 3
Answer: b (5)
27. 6 – 1 = ____.
a) 4
b) 5
c) 3
d) 2
Answer: b (5)
28. 10 – 3 = ____.
a) 6
b) 7
c) 8
d) 9
Answer: b (7)
Week 8: Subtraction (11–20)
29. 20 – 8 = ____.
a) 11
b) 12
c) 13
d) 14
Answer: b (12)
30. 18 – 6 = ____.
a) 11
b) 12
c) 13
d) 14
Answer: b (12)
31. 15 – 7 = ____.
a) 7
b) 8
c) 9
d) 10
Answer: b (8)
32. 14 – 9 = ____.
a) 5
b) 6
c) 7
d) 8
Answer: a (5)
Week 9: Shapes
33. A ball is shaped like a ____.
a) Square
b) Circle
c) Triangle
d) Rectangle
Answer: b (Circle)
34. A book is shaped like a ____.
a) Circle
b) Rectangle
c) Triangle
d) Square
Answer: b (Rectangle)
35. A slice of bread can look like a ____.
a) Square
b) Triangle
c) Circle
d) Rectangle
Answer: b (Triangle)
36. A box is shaped like a ____.
a) Square
b) Circle
c) Triangle
d) Oval
Answer: a (Square)
Week 10: Length
37. A broom is usually ____.
a) Short
b) Long
c) Round
d) Square
Answer: b (Long)
38. A pencil is usually ____.
a) Long
b) Short
c) Heavy
d) Wide
Answer: b (Short)
Week 11: Mass
39. Which is heavier?
a) Stone
b) Feather
c) Paper
d) Leaf
Answer: a (Stone)
40. Which is lighter?
a) Bag of rice
b) Book
c) Orange
d) Feather
Answer: d (Feather)