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|| PRE-ALGEBRA ||
|| LOWEST COMMON MULTIPLE ||
FOR AGES 10 AND 11
POINTS TO REMEMBER :
Common Multiples are many. They are useful when multiplying and dividing fractions. For ease the Lowest Common Multiple - LCM, is used throught the math.
* When finding an LCM, use only multipliers those are whole numbers.
** Be aware of all the numbers you are finding an LCM for.
*** Zero is not considered an LCM.
Example:
Find the LCM of 2 and 5.
The multiples of 2 are: 2, 4, 6, 8, 10, 12, 14, 16, etc.
The multiples of 5 are: 5, 10, 15, 20, 25, 30, etc.
The common multiples of both 2 and 5 are: 10, 20, 30, 40, etc.
10 is the lowest of them.
So, the LCM - Lowest Common Multiple of both 2 and 5 is : 10.
Example:
Find the LCM of 2, 3, and 5.
The multiples of 2 are: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, etc.
The multiples of 3 are: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, etc.
The multiples of 5 are: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, etc.
The common multiples of 2,3, and 5 are: 30, 60, etc.
30 is the lowest of them.
So, the LCM - Lowest Common Multiple of 2, 3, and 5 is : 30.
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