anonymous
  • anonymous
iam 12 yrs old having trouble finding an easy way to find the least common multiple for number pairs.... help
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
how can we help?
anonymous
  • anonymous
i just need help with my math its least common multiple
anonymous
  • anonymous
do you have any examples you would like to work on or should we start working on random ones?

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anonymous
  • anonymous
i have one its the least common multiple of 8 and 20 its iether 2 or 4
anonymous
  • anonymous
Ok, are you sure that you are trying to find the least common multiple or the greatest common factor?
anonymous
  • anonymous
least common multiple it says it on the paper my teacher hand this to me and two others and told me i need it in by monday or i fail
anonymous
  • anonymous
ok well least common multiple is a number that is BIGGER than the two numbers you have and both of the numbers you have can be multiplied into it
anonymous
  • anonymous
since 2 and 4 are smaller than both 8 and 20, we know they cannot be LCMs of them
anonymous
  • anonymous
this is all confusing to me
anonymous
  • anonymous
a least common multiple can also be the same as the biggest of the numbers that you have
anonymous
  • anonymous
well lets look at the name itself then:
anonymous
  • anonymous
least means smallest common means that both relate to it and multiple means that if you multiply either of the numbers you have, you will get a multiple
anonymous
  • anonymous
so a least common multiple is the smallest number that both of the numbers you have, can fit into a certain amount of times
anonymous
  • anonymous
im just confused becuase i dont get how you find it
anonymous
  • anonymous
and my teacher is no help
anonymous
  • anonymous
ok well we know that it has to be at least the value of the biggest number you have
anonymous
  • anonymous
so lets start their, and after we work through the most basic methods of finding a LCM, we can work on faster methods
anonymous
  • anonymous
there*
anonymous
  • anonymous
so 20 is the bigger of the two numbers (8 and 20)
anonymous
  • anonymous
but 8 doesnt divide into 20 without a remainder or a decimal
anonymous
  • anonymous
ok
anonymous
  • anonymous
so that wont work
anonymous
  • anonymous
why is math so cunfusing
anonymous
  • anonymous
the next one we have is 40, because no number in between 20 and 40 will divide by 20, we have to jump all the way to 40
anonymous
  • anonymous
it isint, it just takes practice
anonymous
  • anonymous
so, is 40 divisible by 8?
anonymous
  • anonymous
yes
anonymous
  • anonymous
then that is your least common multiple, see how we started at 20, because it was the farthest down we can go without being lower than 8 and 20, and because it wasnt divisible by 8 we had to go up, and the next available number that was STILL divisible by 20 was 40, we went to 40, and 40 is divisible by both 20 and 8
anonymous
  • anonymous
ok
anonymous
  • anonymous
now what about 120 and 5
anonymous
  • anonymous
well lets start at 120, because that is the lowest we can go right?
anonymous
  • anonymous
i think
anonymous
  • anonymous
anything lower than 120 will be LESS than our two numbers (120 and 5) so we can NOT go lower than 120
anonymous
  • anonymous
so, we start at 120, is 120 divisible by 5?
anonymous
  • anonymous
yess
anonymous
  • anonymous
there ya go!
anonymous
  • anonymous
wut i have no idea what is going on
anonymous
  • anonymous
ok well do you get why we started at 120?
anonymous
  • anonymous
no
anonymous
  • anonymous
remember the definition of a LCM, it has to be bigger than both of your numbers or the same as the biggest of your numbers
anonymous
  • anonymous
we have 5 and 120, since a LCM has to be bigger than both or equal to the biggest, it has to be at least 120
anonymous
  • anonymous
i still dont get this al the numbers just look like letters to me
anonymous
  • anonymous
literally like letters, or youre just confused?
anonymous
  • anonymous
wait nevermind i wus looking at my english homework
anonymous
  • anonymous
....???
anonymous
  • anonymous
i have alot of homework
anonymous
  • anonymous
well how about we finish math first, since it is more important (you dont want to fail) and since you have me available and i have to go eventually
anonymous
  • anonymous
i have to go right now cuz its 11:00 and i have somewhere to go tomarrow
anonymous
  • anonymous
ok...
anonymous
  • anonymous
so then you dont want to learn how to find LCMs?

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