# LCM and HCF of 2 Digits (Primary 6)

MATHEMATICS

SMASE – ASEI PDSI METHOD

FIRST TERM

WEEK 4

PRIMARY 6

TOPIC – L. C. M. AND H. C. F. OF NUMERALS NOT MORE 3 DIGITS

LEARNING AREA

Lesson One – Least Common Multiples

Lesson Two – Highest Common Factors

Lesson Three – Least Common Multiple and Highest Common Factors

Lesson Four – Revision

Lesson Five – Test

TIME – 40 Minutes each.

LEARNING OUTCOME

By the end of the lesson, pupils should be able to:

1. find common factors of 2-digit whole numbers

2. find the HCF of 2-digit whole numbers.

3. find common multiples of 2-digit whole numbers

4. find the LCM of 2-digit whole numbers.

RATIONALE

LCM stands for Lowest Common Multiple. HCF on the other hand, stands for Highest Common Factor. LCM and HCF are both used to minimize or maximize possible outcomes between two or more things.

The concept of LCM and HCF will enable people to understand and appreciate the importance of LCM and HCF in sharing or allocating two or more things among different groups with any conflict or waste.

LEARNING MATERIALS

The teacher will teach the lesson with the aid of charts of factors and multiples of numbers.

PREVIOUS KNOWLEDGE

The pupils have the knowledge of multiplication of numbers up to 12 x 12.

REFERENCE MATERIALS

9 – Years Basic Education Curriculum

Lagos State Scheme of work

New Method Mathematics Book

All Relevant Materials

Online Materials

LESSON PLAN/DEVELOPMENT

ASEI PDSI LESSON NOTES

LESSON DEVELOPMENT 1 – LCM – Least Common Multiple docx

LESSON DEVELOPMENT 2 – HFC Highest Common Factors docx

LESSON DEVELOPMENT 3 – Repeat the activities in one and two

LESSON DEVELOPMENT 4 – REVISION AND TEST