# 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 3-digit numbers without exchanging or renaming.

ENTRY BEHAVIOUR

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

2. Bean seed.

3. Cards, etc.

4. Charts on addition of 3-digit numbers without renaming, etc.

5. Counters such as sticks, bottle tops.

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.

1. 567 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

2. 765 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

3. 765 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

4. 765 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

Pupil’s Activities 2 – Exercise/Take Home (20 minutes)

1. 729 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

2. 543 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

3. 872 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

4. 725 = _____ + _____ + _____ = _____ Hundreds + _____ Tens + _____ units

5. 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 3-digit numbers.

Pupil’s Activities – Solves subtraction of 3-digit 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 3-digit numbers vertically without exchanging or renaming.