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LCM & HCF

Mathematics JSS 2 Week WEEK .......... Preview
Lesson Details (Preview)

Week Range: ................... – ...................

Date: ...................

Time: ...................

Duration: 40 minutes minutes

Theme: Number Theory and Operations

Sub-topic: Lowest Common Multiple (LCM) & Highest Common Factor (HCF)

Learning Objectives (Preview)

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

  1. Identify common factors and multiples of given numbers
  2. Calculate the HCF of two or more numbers using prime factorization
  3. +2 more objectives in full version
Rationale (Preview)
Understanding LCM and HCF is fundamental to simplifying fractions, solving problems involving cycles (e.g., when events will next occur together), and [Preview only]
Presentation Steps (Preview)
Step / Time Teacher's Activities Student's Activities Learning Points
Step 1: 5 minutes — Introduction & Review
The teacher will greet the class and briefly review prime numbers and factors. "Who can remind us wh [Preview only]
Students will respond to questions about prime numbers and factors. A few volunteers will list facto [Preview only]
Students recall factors and prime numbers, preparing for HCF/LCM.
Step 2: 15 minutes — Highest Common Factor (HCF)
The teacher will explain HCF using an example: finding the HCF of $12$ and $18$. The teacher will de [Preview only]
Students will follow the examples, listing factors and identifying common ones. They will participat [Preview only]
Students learn to calculate HCF using listing and prime factorization methods.
+2 more steps in full version
Student Note (Preview)
1,874 characters total — showing first 400
## LCM & HCF **What is LCM & HCF?** LCM (Lowest Common Multiple) is the smallest number that is a multiple of two or more numbers. HCF (Highest Common Factor) is the largest number that divides two or more numbers exactly. **Key Points** 1. Factors are numbers that divide another number exactly. Multiples are numbers you get when you multiply a number by other whole numbers. 2. To find HCF, you ca [Preview only]

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