anonymous
  • anonymous
i have not done LCD for 7 years. im still reading about it and i still dont get it. can some one help me?
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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anonymous
  • anonymous
The LCD of two numbers is the smallest number that both multiply into by some other number.
anonymous
  • anonymous
ok. so what would the lcd of 20 be? for example
anonymous
  • anonymous
Find an example in a book. It usually involves two numbers

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anonymous
  • anonymous
LCD is between two or more numbers.
anonymous
  • anonymous
LCD of 5 and 3 is 15, because that is the smalled number both 5 and 3 go into.
anonymous
  • anonymous
ok. i get it now. thanks so much:)
anonymous
  • anonymous
here is how you find it for big numbers: factor each number into prime factors, then take each prime to the highest power you see in any one number. 5 and 3 are both primes, so just multiply. but for say 8 and 12 you would write \[8=2^3\] \[12=2^2\times 3\] so least common multiple is \[2^3\times 3 = 24\] of course you might have just seen the 24, but for 84 and 98 you would probably not see the answer. \[84=2^2\times 3 \times 7\] \[98=2 \times 7^2\] least common multiple is \[2^2 \times 3 \times 7^2 = 588\]

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