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SAME(:):)(:

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my Q is the same as arths

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i learnt that method 2 is easier than method 1 but method 1 is more precise but other than that i didn't
understand

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what happens i when its a really small number or a decimal or a minus number

Ms. Griffins reply:
Good question. However, multiples are always whole numbers that are positive. If the numbers are small then the process won't take you long!

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i learnt that LCM stood for least comon multiple

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I learnt that you can use to help you with most maths in division. I don't understand how he just added on a 4 randomly

Ms. Griffins reply:
I didn't notice him do that. Perhaps watch the video again?

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I did not really understand any of it but i started to get the brutal force method untill he did not make it clear to me how the multiples asosiated with the question. I thought that it was suposed to be about multiples

Ms. Griffins reply:
Well spotted, the question is about multiples but in order to find multiples we use factors

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I learnt that  instead of just listing the numbers like 1,2,3 ... There is another way of doing it . My question is that why would you want to go for the harder way of doing it my dad always says that maths is about saving time ?

Ms. Griffins reply:
As the video explains: the 'harder' method is more fun and it will help you to be systematic when dealing with big numbers.

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I learnt that you need to make sure you have a say 2 and a 2 or a 3 and 3.
My question was the fact that when the video ran out of numbers for both sides he just times it by two. Which would of givin you a different anwser

Ms. Griffins reply:
He multiplied by 2 because the list of factors needed to have all the ingredients from the factor lists of both 18 and 12. At first the list only has one 2 but there are two 2s in the factor list for 12.

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I learnt that when dealing with this type of maths there are two ways of doing it. One is to find the lowest common multiple by multiplying the number by its multiples.  After that he would find the lowest and he would be done. The other way to do it is by making a factor tree and then doing what we did to finish in class but put the numbers together and times them together and it shall show the answer to the question.

Ms. Griffins reply:
Very good summary Jack. However, what we were doing in class was finding the Highest Common Factor (HCF). This video is about the Lowest Common Multiple (LCM). The two processes are similar but different.

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Iearnt that you take the  prime facterucation from both of the numbers that has both of the ingredients for both of the numbers and that will be the least common number. My question is how you make up the number that makes the number you started with.

Ms. Griffins reply:
Excellent summary of the key learning point, Sam.
To answer your question: you use the prime factor trees to find the list of factors that make up the numbers you started with.

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Multiples are BIG.
Factors are SMALL.

For example:
- the MULTIPLES of 10 are: 10, 20, 30, 40, 50...
- the FACTORS of 10 are: 1, 2, 5 and 10

This video is about MULTIPLES.

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Least common multiple exercise | Factors and multiples | Pre-Algebra | Khan Academy