SubjectPaid lesson
LCM (Lowest Common Multiple).
CT
ClassNotes Team 1 MIN READUPDATED 14 JUL 2026Mathematics for JSS 1 First Term
Week 3
LCM (Lowest Common Multiple).
Performance Objectives.
Students should be able to
- Identify the common multiple of two or more numbers.
- Find the LCM of whole numbers.
Content.
Multiples are numbers in the times tables. That is the numbers in our multiplication tables.
Example 1: Find the first 10 multiples of 2 and 4.
b. find the common multiple of 2 and 4.
2=2,4,6,8,10,12,14,16,18,20.
4=4.8.12.16.20,24,28,32,36,40.
Common Multiple=4,8,12,16,20.
Example 2:
Write out the 10 multiples of 10,15, and 30.
b. find the common multiple.
10=10,20,30,40,50,60,70,80,90,100.
15=15,30,45,60,75,90,105,120,135,150.
30=30,60,90,120,150,180,210,240,270,300.
Common Multiple=30,60,90.
PERIOD 2.
Example1: Find the LCM of 30 and 45
2 30 45
3 15 45
3 5 15
5 5 5
- 1 LCM=2x3x3x5=90
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