# Multiplication of 2 Digit Numbers by One Digit Number (Primary 3)

**MATHEMATICS **

**SECOND TERM** ** **

**WEEK 3**

**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 – MULTIPLICATION OF 2 DIGIT NUMBERS BY ONE DIGIT NUMBER**

**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 –

1. multiply from 1 × 1 to 9 × 9.

2. multiply 2-digit number by 1-digit number.

3. carry out correct multiplication in everyday activities.

**ENTRY BEHAVIOUR **

**INSTRUCTIONAL MATERIALS**

The teacher will teach the lesson with the aid of:

1. 10 × 10 square chart.

2. Multiplication table.

3. Chart showing multiplication of 2-digit numbers by 1-digit number.

4. Multiplication charts for three 1-digit numbers.

5. 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 **

Teacher’s/Pupil’s Activities 1 – Group, Add and Multiply

Study the Samples

~~AA~~~~AA~~~~AA~~~~AA~~4 groups of 2A

2 + 2 + 2 + 2 = 8

2 x 4 = 8

~~0000~~~~0000~~~~0000~~3 groups of 4 zeros

4 + 4 + 4 = 12

4 x 3 = 12

Copy and Complete

1.

~~BBB~~~~BBB~~~~BBB~~~~BBB~~~~BBB~~5 group of 3B

3 + ____ ± ____ + ____ + 3 = ____

3 x ____ = 15

2. 👜👜👜👜👜 👜👜👜👜👜 👜👜👜👜👜 👜👜👜👜👜 👜👜👜👜👜

4 groups of ____ bags

____ ± ____ + ____ + 5 = ____

4 x 5 = ____

3. 👚👚 👚👚 👚👚

2 groups ____ gowns

____ + 2 + ____ = ____

____ x 3 = ____

4. 👠👠👠 👠👠👠 👠👠👠 👠👠👠 👠👠👠

5 groups of ____ shoes

3 + ____ ± ____ + ____ + 3 = ____

3 x 5 = ____

Pupil’s Activities 2 – Take Home

**Multiplication Table 1 – 10**

**LESSON TWO – BASIC MULTIPLICATION **

Pupil’s Activities 1 – Quick Test (5 minutes)

Use the Multiplication to Complete the following,

1. 3 x 6 =

2. 7 x 5 =

3. 3 x 3 =

4. 9 x 7 =

Pupil’s Activities 2 – Revision on Expansion of Numbers (5 (minutes)

Sample

17 = 10 + 7

23 = 20 + 3

48 = 40 + 8

Expand the following numbers,

1. 1. 28 = ____ + 8

2. 32 = ____ + 2

3. 46 = ____ + ____

4. 54 = ____ + ____

Teacher’s/Pupil’s Activities 3 – Multiplication by Expanded Method (10 minutes)

Working Examples

23 x 2

2 3 = 20 + 3

20 + 3

x 2

______

40 + 6 = 46

Therefore, 23 x 2 = 46

35 x 3

32 = 30 + 5

30 + 5

x 3

_______

90 + 15

= 90 + 10 + 5

= 100 + 5 = 105

Therefore, 35 x 3 = 105

Pupil’s Activities 4 – Exercise/Take Home (20 minutes)

Multiply each of the following

1. 32 x 3

2.13 x 2

3. 47 x 3

4. 85 x 5

**LESSON THREE – MULTIPLICATION BY SHORT METHODS **

Teacher’s/Pupil’s Activities 1 – Marking and Correction

By Both Methods

1. 32 x 3

32 = 30 + 2

30 + 2 3 2

x 3 x 3

_______ _____

90 + 6 = 9 6

Therefore, 32 x 3 = 96

2.13 x 2

13 x 2

10 + 3 1 3

x 2 x 2

_______ _____

20 6 = 26 2 6

3. 47 x 3

47 = 40 + 7

40 + 7 4 7

x 3 x 3

_______ _____

120 + 21 141

=120 + 20 + 4

= 144

Pupil’s Activities 2 – Exercise/Take Home1. 4 4 2. 2 4 3. 5 2 4. 3 4

x 6 x 7 x 3 x 2

______ ______ ______ ______

______ ______ ______ ______

LESSON FOUR – APPLICATION

Working Examples

A cat has 4 legs. How many legs do 13 cats have?

A cat has 4 legs, 1 x 4 = 4.

Two cats have 8 legs, 2 x 4 = 8.

Three cats have _____, 3 x 4 = 12.

Six cats have _____, 6 x 4 = _____.

13 cats have _____, 13 x 4 = _____.

QUANTITATIVE REASONING, AS STATED IN THEIR QUANTITATIVE BOOKS OR TEXTBOOKS

**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 in the use of square charts to carry out multiplication from 1 × 1 to 9 × 9.

Pupil’s Activities – Use square charts and multiplication tables to carry out multiplication from 1 × 1 to 9 × 9.

3. Guides pupils to use repeated addition for multiplication.

Pupil’s Activities – Carry out multiplication of 2-digit numbers by 1-digit number and use repeated addition for multiplication.

4. Guides pupils to use multiplication chart to multiply 2-digit number by 1-digit number horizontally or vertically.

Pupil’s Activities – Practice multiplication of 2-digit numbers by 1-digit number horizontally and vertically.

5. Guides pupils to multiply three 1-digit numbers taking two at a time.

Pupil’s Activities – Carry out series of multiplication of three 1-digit numbers taking two at a time.

6. Emphasizes the need to carry out correct multiplication in everyday activities.

Pupil’s Activities – Carry out correct multiplication in everyday activities.

7. Leads pupils to give examples of areas where correct multiplication is important in everyday activities.

Pupil’s Activities – Give examples of everyday activities that require correct multiplication.

**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:**

1. carry out given multiplications from 1 × 1 to 9 × 9.

2. multiply given 2-digit number by 1-digit number.

3. multiply 2-digit number by 1-digit number vertically or horizontally.

4. multiply given three 1-digit numbers taking two at a time.

5. give examples of everyday activities that require correct multiplications