For 18 and 36 why did you not multiply the 3 , 3 , and the 2 on the 36 because I thought you were supposed to multiply all the circles Please help my test is tomorrow
The GCF *is* 3 x 3 x 2, or 18. To find the LCM, you can multiply the 18 by the 2 left over on 36 to *get* 36. Or, you can multiply 36 by nothing, because nothing is what’s left on the 18, and it *stays* 36. I hope that helped. Good luck on your test!
Okay, Prime factorization of a solar-lunar eclipse cycle of 1260 (years) is 2,2,3,3,7,5. The smallest cycle of an eclipse is 18 (just over 18 years), and its factorization is 2,3,3. What is the GCF and LCM of the two numbers?
Are you asking me? 18 = 2 x 3 x 3 1260 = 2 x 2 x 3 x 3 x 5 x 7 They share a 2 x 3 x 3 and so the GCF is 18. You can find the GCF by multiplying 18 by the 2 x 5 x 7 that is left and getting 1260 or by multiplying 1260 by nothing (which is what's left on the 18 row) and having it stay 1260.
That is a good question! The GCF is the same, except that you're looking for numbers that are shared by all three. For example, 15=3×5, 10=2×5, and 25=5×5. The only factor that is shared by all three is a single instance of 5, so GCF(15, 10, 25)=5. For LCM, there are two ways to do it. Probably the easier of the two to visualize is to find the LCM of any two and then find the LCM of that new number and the third. For example, you can quickly see that the LCM of 15 and 10 is 30 because 15 times the 2 left over on the other side and 10 times the 3 left over on the other side each give you 30. The GCF of 30 and 25 is 150 because 30 times the 5 left over on the other side and 25 times the 2 and 3 left over on the other side both give you 150. The other way to do it is to multiply one of them by one instance of anything that shows up extra in the other trees. I think I would need to make another video because that could be confusing sometimes, such as if the numbers were 15, 10, and 20.
I am having my big exam tomorrow for math for the 1st semester and it has 30 items, suprisingly i'm not scared at all! (well only 3.5%) anyways TYSM it helped alot!
I’m still confused because if you had 15 and 60 15 could be 15 and 1 or 5 and 3 while 60 could be 60 and 1 or 15 and 4 or 6 and 10 or 30 and 2 or 20 and 3 I’m so confused
This is true, and by using factor pairs, you can see that 15 is the biggest number that is in both lists. My method is an alternative to factor pairs. 15 = 3 × 5 60 = 2 × 2 × 3 × 5 Because both have 3 × 5, and because 3 × 5 = 15, you can see that the GCF is 15 here too. The advantage of mine is that it shows you LCM is 60 by telling you to multiply 15 by the leftover 2 × 2. Does this help?
Thank you for your comment. I understand what you’re saying, and I could go faster, but a lot of people need me to go slowly through how to do these so that they have time to process it before I move on to the next thing. Have a good day!
thank you for shortcuts at GCF and LCM this help for my test
You're very welcome. I'm glad it helped you!
Amazingly helpful, thank you.
I am pumped for my test tom you helped me so much thx
Thank you so much for this video it really helped me study for my test.😊
Thank you. I'm glad it helped.
You helped me study for my test your the best
I'm so ready for this quiz, thanks!!
My pleasure!
Thank u abd that handwriting doe is amazing your method made me ace my exam thx bro
Da.yarutaneue😫😫
I am eight years old I love how you do math
Thank you! Ur video is really helpful! 👏👏👏
You're very welcome. I'm glad it was able to help you!
THANKS my grades are now going up! Thanks and just in time for Christmas!
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Thank you a million times
I'm really glad it was helpful for you!
Aye thanks for helping a 6th grader out.me.crasy trick by the way!
This helped me a lot now I know how to do the GCF but I still don't understand the LCM thingy ;-; *dont have to reply * OoF
lcm is easier than gcf....
You made it so easy
Thank you, I try!
thank you i understand now
Thank you so much for this video it really help in my assignment😊
Alexandra Z. You are very welcome. I'm glad it helped!
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For 18 and 36 why did you not multiply the 3 , 3 , and the 2 on the 36 because I thought you were supposed to multiply all the circles
Please help my test is tomorrow
The GCF *is* 3 x 3 x 2, or 18. To find the LCM, you can multiply the 18 by the 2 left over on 36 to *get* 36. Or, you can multiply 36 by nothing, because nothing is what’s left on the 18, and it *stays* 36. I hope that helped. Good luck on your test!
Kevin Pledger thanks so much I got a A on my test
@@mayhaan4004 Good job! I'm very happy for you!
Thank you this helped me for my test
You're very welcome! I'm glad it helped.
Kevin Pledger can you subscribe me
Kevin Pledger no problem you really helped me
Woah niceee.... hope this help me from my reviews(:
Thank you, I hope it helps you as well!
This helps so good to me because its my test tom.
How did you end up doing?
I love you ❤️💕😘 daddy
Thank you😊
thanks really needed it!
Glad it helped!
I’m your favorite baby girl and I’m 7 years old
Tysm it helped me alot
How do you do it when there is tree number to do on GCF and LCM
Okay, Prime factorization of a solar-lunar eclipse cycle of 1260 (years) is 2,2,3,3,7,5. The smallest cycle of an eclipse is 18 (just over 18 years), and its factorization is 2,3,3. What is the GCF and LCM of the two numbers?
Are you asking me?
18 = 2 x 3 x 3
1260 = 2 x 2 x 3 x 3 x 5 x 7
They share a 2 x 3 x 3 and so the GCF is 18. You can find the GCF by multiplying 18 by the 2 x 5 x 7 that is left and getting 1260 or by multiplying 1260 by nothing (which is what's left on the 18 row) and having it stay 1260.
What happens when you seek the GCF and the LCM of three numbers using this method?
That is a good question! The GCF is the same, except that you're looking for numbers that are shared by all three. For example, 15=3×5, 10=2×5, and 25=5×5. The only factor that is shared by all three is a single instance of 5, so GCF(15, 10, 25)=5.
For LCM, there are two ways to do it. Probably the easier of the two to visualize is to find the LCM of any two and then find the LCM of that new number and the third. For example, you can quickly see that the LCM of 15 and 10 is 30 because 15 times the 2 left over on the other side and 10 times the 3 left over on the other side each give you 30. The GCF of 30 and 25 is 150 because 30 times the 5 left over on the other side and 25 times the 2 and 3 left over on the other side both give you 150.
The other way to do it is to multiply one of them by one instance of anything that shows up extra in the other trees. I think I would need to make another video because that could be confusing sometimes, such as if the numbers were 15, 10, and 20.
Why is it not possible to multiply the 5 with the 25 instead of doing 2 with 25?
Thanks a lot 😀
Lisa Tetlow You are very welcome. I am happy it helped you.
I HAVE AN EXAM TOMMOROW HOPE THIS HELPS
🙏🏻
This helped TYSM
Sorry for the late reply. I'm glad it helped!
I am having my big exam tomorrow for math for the 1st semester and it has 30 items, suprisingly i'm not scared at all! (well only 3.5%) anyways TYSM it helped alot!
You're very welcome. I am glad I could help!
its very easy to understand
Thank you, I try.
Boxing and circling unwanted numbers..this video confused me. How he skipped steps.
I’m still confused because if you had 15 and 60
15 could be 15 and 1 or 5 and 3 while 60 could be 60 and 1 or 15 and 4 or 6 and 10 or 30 and 2 or 20 and 3 I’m so confused
This is true, and by using factor pairs, you can see that 15 is the biggest number that is in both lists. My method is an alternative to factor pairs.
15 = 3 × 5
60 = 2 × 2 × 3 × 5
Because both have 3 × 5, and because 3 × 5 = 15, you can see that the GCF is 15 here too. The advantage of mine is that it shows you LCM is 60 by telling you to multiply 15 by the leftover 2 × 2.
Does this help?
oops, sorry I was looking at another video.
Thankssss
You're very welcome!
Please can you break it down
Hi
If only you were a little faster
Thank you for your comment. I understand what you’re saying, and I could go faster, but a lot of people need me to go slowly through how to do these so that they have time to process it before I move on to the next thing. Have a good day!
Kevin Pledger understandable, thank you
This is very confusing!
T-T I.HATE.SCHOOL one if u hate shOl
Horrible audio but helpful tips
I can’t understand a single thing 😔😔😔😔
Didn't help me