# Distributive Rule of Multiplication Over Addition and Subtraction (Primary 3)

**MATHEMATICS **

**SECOND TERM** ** **

**WEEK 5**

**PRIMARY 3**

**THEME – BASIC OPERATIONS **

**PREVIOUS LESSON – Second Term Scheme of Work and Plan Lesson Notes for MATHEMATICS Week 1 to Week 12 Primary Schools**

**TOPIC – DISTRIBUTIVE RULE OF MULTIPLICATION OVER ADDITION AND SUBTRACTION **

**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 expand using the distributive rule.

**ENTRY BEHAVIOUR **

**INSTRUCTIONAL MATERIALS**

The teacher will teach the lesson with the aid of:

1. counters like beads, sticks, etc.

2. 10 x 10 square charts

3. Multiplication table

**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 – Identification of Open and Close Bracket ( ) Sign with Multiplication Addition and Subtraction Signs

Introductory Questions

What sign is this, x, +, and —?

Expected Response

+, this is plus

—, this is minus

Identify the signs in the question,

5 x (3 + 2)

3 x (5 — 2)

Expect Response

We have multiplication, addition and Subtraction signs.

Teacher’s remark – What about this ( )? ( – this is called open bracket while ) – close bracket. ( ) is the same with { }.

Pupil’s Activities 2 – Basic Multiplication, Addition and Subtraction

Guide pupils solve,

1. 5 x (3 + 2)

= 5 x (5)

= 5 x 5

= 25

2. 3 x (5 — 2)

= 3 x (5 — 2)

= 3 x (3)

= 3 x 3

= 9

Pupil’s Activities 3 – Exercise/Take Home

Simplify

1. 7 x (4 + 3)

2. (3 + 4) x 7

3. (8 — 5) x 4

4. 4 x (9 — 6)

**LESSON TWO – DISTRIBUTIVE RULE OF MULTIPLICATION OVER ADDITION**

Teacher’s/Pupil’s Activities 1 – Expand using Distributive Rule

5 x (3 + 2)

= (5 x 3) + (5 x 2) 5 x (5)

= 15 + 10 compare 5 x 5

= 25

(3 + 4) x 7

= (7 x 3) + (7 x 4)

= 21 + 28

= 49

Pupil’s Activities 2 – Exercise/Take Home

Expand using Distributive Rule

1. (2 + 2) x 5

2. (5 + 1) x 6

3. 4 x (3 + 2)

4. 3 x (3 x 3)

**LESSON THREE – DISTRIBUTIVE RULE OF MULTIPLICATION OVER SUBTRACTION **

Teacher’s/Pupil’s Activities 1 – Expand Using Distributive Rule

3 x (5 — 2)

= (3 x 5) — (3 x 2) 3 x (3)

= 15 — 6 3 x 3

= 9

(3 + 4) x 7

= (7 x 3) + (7 x 4)

= 21 + 28

= 49

Pupil’s Activities 2 – Exercise/Take Home

Expand using Distributive Rule

1. (2 + 2) x 5

2. (5 + 1) x 6

3. 4 x (3 + 2)

4. 3 x (3 + 3)

**LESSON THREE – DISTRIBUTIVE RULE OF MULTIPLICATION OVER SUBTRACTION **

Teacher’s/Pupil’s Activities 1 – Expand Using Distributive Rule

3 x (5 — 2)

= (3 x 5) — (3 x 2) 3 x (3)

= 15 — 6 3 x 3

= 9

(5 — 3) x 7

= (7 x 5) — (7 x 3)

= 35 — 21

= 14

Pupil’s Activities 2 – Exercise/Take Home

Expand using Distributive Rule

1. (3 — 2) x 5

2. (5 — 1) x 6

3. 4 x (7 — 2)

4. 3 x (8 — 3)

**LESSON FOUR – DISTRIBUTIVE RULE OF MULTIPLICATION OVER ADDITION AND SUBTRACTION **

Teacher’s/Pupil’s – More Questions

**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 expand using distributive rule.

Pupil’s Activities – Follow the teacher’s guidelines.

**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 expand using the distributive rule. **