Asked by Jasper
How do I figure out the GCF and the LCM of these three numbers 10-55 and 45
Answers
Answered by
helper
I pasted below an example that reiny (tutor here) did recently.
10 and 55 are done in this example. Follow what reiny did for 45.
EXAMPLE
10 = 2*5
75 = 3*5*5
55 = 5*11
The GCF is the largest number that divides into all three numbers,
in this case 5
the GCF ≤ the smallest of the numbers
The LCM is that number which contains all the factors that are found in all the numbers
in this case it is 2*3*5*5*11 = 1650
It is the smallest number that the given numbers divide INTO evenly
the LCD ≥ the largest of the given numbers.
for the LCD I usually write down the longest string of factors, then looking at the other group of factors, I include any others not yet included in my string.
10 and 55 are done in this example. Follow what reiny did for 45.
EXAMPLE
10 = 2*5
75 = 3*5*5
55 = 5*11
The GCF is the largest number that divides into all three numbers,
in this case 5
the GCF ≤ the smallest of the numbers
The LCM is that number which contains all the factors that are found in all the numbers
in this case it is 2*3*5*5*11 = 1650
It is the smallest number that the given numbers divide INTO evenly
the LCD ≥ the largest of the given numbers.
for the LCD I usually write down the longest string of factors, then looking at the other group of factors, I include any others not yet included in my string.
Answered by
tammie
I am looking for the GCF and LCM of the ages 50,55,10. Can you help me with that?
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