lesson 5-6 pages 226-230 least common multiple lesson check 5-5
Post on 25-Dec-2015
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What you will learn!1. How to find the LCM of two
or more numbers.
2. How to find the LCD of two or more fractions.
MultipleMultiple
Common MultipleCommon Multiple
Least common multipleLeast common multiple
Least common denominatorLeast common denominator
What you really need to know!
The least common multiple (LCM) is the least nonzero number that is a multiple of the given numbers.
What you really need to know!
The least common denominator (LCD) of two or more fractions is the LCM of the denominators.
LCM = 2 2 2 3 3 = 72
8 = 2 2 2
18 = 2 3 3
Example:
Find the LCM of 8 and 18.8 88 1616 2424 3232 4040 4848 5656 6464 7272
18 1818 3636 5454 7272 9090 108108 126126 144144 162162
8 88 1616 2424 3232 4040 4848 5656 6464 7272
18 1818 3636 5454 7272 9090 108108 126126 144144 162162
Example 5:
Find the LCD of 9/36a2b and 16/27ab2 :
baaba 332236 2
bbaab 33327 2
2•2•3•3•3•a•a•b•b = 108a2b2
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