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

Last Updated on July 16, 2020 by Alabi M. S.

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 Home

1. 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

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