Subtraction of 3 Digit Numbers Without Remaining (Primary 2)
MATHEMATICS
SECOND TERM
WEEK 5
PRIMARY 2
THEME – BASIC OPERATIONS
PREVIOUS LESSON – Second Term Scheme of Work and Plan Lesson Notes for MATHEMATICS Week 1 to Week 12 Primary Schools
TOPIC – SUBTRACTION OF 3 DIGIT NUMBERS WITHOUT REMAINING
PERFORMANCE OBJECTIVES
By the end of the lesson, the pupils should have attained the following objectives (cognitive, affective and psychomotor) and should be able to subtract 3digit numbers without exchanging or renaming.
ENTRY BEHAVIOUR
INSTRUCTIONAL MATERIALS
The teacher will teach the lesson with the aid of:
1. Number beads.
2. Bean seed.
3. Cards, etc.
4. Charts on addition of 3digit numbers without renaming, etc.
5. Counters such as sticks, bottle tops.
6. Addition cards.
METHOD OF TEACHING – Choose a suitable and appropriate methods for the lessons.
Note – Irrespective of choosing methods of teaching, always introduce an activities that will arouse pupil’s interest or lead them to the lessons.
REFERENCE MATERIALS
1. Scheme of Work
2. 9 – Years Basic Education Curriculum
3. Course Book
4. All Relevant Material
5. Online Information
CONTENT OF THE LESSON
LESSON ONE – INTRODUCTION
Pupil’s Activities 1 – Subtraction by Expansion (10 minutes)
Sample
28 — 15
28 = 20 + 8 (—)
25 = 10 + 5
______________
13 = 10 + 3
57 — 35
57 = 50 + 7 (—
35 = 30 + 5
____________
22 = 20 + 2
Expand
1. 42 — 12
2. 74 — 43
Pupil’s Activities 2 – Subtraction by Arranging in Tens and Units (10 minutes)
Sample
46 — 25
T U
4 6 (—)
2 5
____
2 1
59 — 35
T U
5 9 (—)
3 5
______
2 4
Arrange in Tense and Units
1. 44 — 12
2. 34 — 13
Pupil’s Activities 3 – Exercise/Take Home (20 minutes)
Using expansion methods
1. 55 — 34
2. 35 — 25
Arrange in Tens and Units
3. 55 — 33
4. 63 — 11
LESSON TWO – EXPANSION OF 3 DIGIT NUMBERS
Teacher’s/Pupil’s Activities 1 – Expansion of 3 Digit Numbers (10 minutes)
Sample
152 = 100 + 50 + 2 = 1 Hundred + 5 Tens + 2 Units
365 = 300 + 60 + 5 = 3 Hundreds + 6 Tens +5 Units
Copy and complete the following.
 567 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

765 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

765 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

765 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units
Pupil’s Activities 2 – Exercise/Take Home (20 minutes)
 729 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

543 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

872 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

725 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

555 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units
LESSON THREE – SUBTRACTION BY EXPANSION OF 3 DIGIT NUMBERS
Teacher’s/Pupil’s Activities 1 – Working Examples
Sample
543 — 111
543 = 500 + 40 + 3 (—)
222 = 200 + 20 + 2
______________________
321 = 300 + 20 + 1
453 — 341
453 = 400 + 50 + 3 (—)
341 = 300 + 40 + 1
___________________
125 = 100 + 10 + 2
Pupil’s Activities 2 – Exercise/Take Home
1. 446 — 234
2. 334 — 111
3. 345 — 234
4. 763 — 334
LESSON FOUR – ARRANGE IN HUNDREDS, TENS AND UNITS AND SUBTRACT
Pupil’s Activities 1 = Arrange in H T U
Sample
123
H T U
1 2 3
436
H T U
4 3 6
Arrange in H T U
1. 323
2. 462
Teacher’s/Pupil’s Activities 2 – Arrange in H T U and Subtract
Subtract 322 and 565
H T U
3 2 2 (—)
2 1 2
________
1 1 0
456 — 321
H T U
4 5 6 (—)
3 2 1
______
1 3 5
Pupil’s Activities 2 – Exercise/Take Home
1. 723 — 201
2. 251 — 120
3. 321 — 213
4. 501 —100
PRESENTATION
To deliver the lesson, the teacher adopts the following steps:
1. To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the pupils some questions;
2. Guides pupils to solve subtraction problems of 3digit numbers.
Pupil’s Activities – Solves subtraction of 3digit numbers.
CONCLUSION
To conclude the lesson for the week, the teacher revises the entire lesson and links it to the following week’s lesson.
LESSON EVALUATION
Pupils to subtract 3digit numbers vertically without exchanging or renaming.