tag:blogger.com,1999:blog-4242439961617529545.post1088966460500635410..comments2017-09-23T19:30:54.784+01:00Comments on Resourceaholic: Tricks and Tips 1: HCFJoanne Morgannoreply@blogger.comBlogger14125tag:blogger.com,1999:blog-4242439961617529545.post-66139727499116217332017-08-25T20:15:55.456+01:002017-08-25T20:15:55.456+01:00When using the upside down cake method, you can us...When using the upside down cake method, you can use any common factor. You don't have to use prime factors. I've been teaching it this way ever since I started teaching. Students like it. You can also use it to rewrite a sum as a product of the GCF and the sum of 2 other numbers with no common factor. For example, I tell students to put the sum inside the cake and continue with the methodUnknownhttps://www.blogger.com/profile/04615092627111584132noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-5046289301400779572017-04-07T14:10:14.239+01:002017-04-07T14:10:14.239+01:00Thanks for clearing that up!Thanks for clearing that up!Kinhttp://gcsemathsworksheets.comnoreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-11565562653449505012017-03-08T05:31:42.751+00:002017-03-08T05:31:42.751+00:0016|64 70 48
4|4 35 3
35|1 35 3
|1 1 3
3|1 ...16|64 70 48<br /> 4|4 35 3<br />35|1 35 3<br /> |1 1 3<br /> 3|1 1 1<br />LCM =16*4*35*3=6720eulerhttps://www.blogger.com/profile/00227397908728433917noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-91190717036459125172016-10-24T15:44:58.848+01:002016-10-24T15:44:58.848+01:00Amazing materialAmazing materialLaura Jameshttps://www.blogger.com/profile/05435675622017105709noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-77928226656710918582016-10-11T15:51:30.274+01:002016-10-11T15:51:30.274+01:00Thanks for helping me with LCM & HCF.You clear...Thanks for helping me with LCM & HCF.You cleared a demon that had settled in my since I was 8 years oldshreyas kapoorhttps://www.blogger.com/profile/14020718406679679365noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-21041346497853491182016-09-21T23:13:41.084+01:002016-09-21T23:13:41.084+01:00The Indian Method does work for more than two numb...The Indian Method does work for more than two numbers, however, you need to use two slightly different approaches to find the HCF and LCM. For HCF, find the HCF of two of the numbers and then the HCF of that number and the third. For LCM you use the "normal" Indian method but you have to continue dividing until you have removed any duplicates or composite number from the horizontal. (Matthew Conradhttps://www.blogger.com/profile/13409361123322534138noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-49135165558820592682016-06-04T19:18:24.822+01:002016-06-04T19:18:24.822+01:005. The Indian Method is a nice method to teach BUT...5. The Indian Method is a nice method to teach BUT it appears to fall down in calculating the LCM of 3 numbers. <br />Is finding the LCM of 3 numbers in the new GCSE syllabus? Kinhttp://gcsemathsworksheets.comnoreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-27154559958265273422016-04-29T18:26:56.346+01:002016-04-29T18:26:56.346+01:00great postgreat postAmmynoreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-538267567324350322016-04-01T18:19:58.154+01:002016-04-01T18:19:58.154+01:00Thank you, that's interesting! I'm glad yo...Thank you, that's interesting! I'm glad you found it helpful.Joanne Morganhttps://www.blogger.com/profile/11919801458664779971noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-89015486137084227572016-01-15T09:39:25.716+00:002016-01-15T09:39:25.716+00:00This is an excellent post. I used to use a listin...This is an excellent post. I used to use a listing method until I was shown the Venn method and have been using that ever since. I was looking at my son's book and noticed his teacher uses the Indian method instead of a factor tree to do prime factor decomposition of a single number. I had no idea it could be extended in this way to two numbers and love that you can short cut by taking outBMa02https://www.blogger.com/profile/00321015464362957272noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-42473539569341964102015-11-19T21:37:24.093+00:002015-11-19T21:37:24.093+00:00I'm glad you've found this helpful. I hope...I'm glad you've found this helpful. I hope your students liked it too! Joanne Morganhttps://www.blogger.com/profile/11919801458664779971noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-90004500440947381992015-11-04T19:20:13.080+00:002015-11-04T19:20:13.080+00:00Wow! I love finding 'new' ways and trying ...Wow! I love finding 'new' ways and trying them out! I'm going to show the Indian method to my department tomorrow and see what they think. More importantly I'm going to try it with my GCSEs retake class who really benefit from different approaches that they potentially work better for them. Thank you for sharing Michelle Guyhttps://www.blogger.com/profile/06725451606880102268noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-1658250829068163482015-03-24T14:11:16.006+00:002015-03-24T14:11:16.006+00:00Response to my post from Dave Gale (@reflectivemat...Response to my post from Dave Gale (@reflectivemaths): <br /><br />https://reflectivemaths.wordpress.com/2015/03/21/hcf-and-lcm-resourceaholic/Joanne Morganhttps://www.blogger.com/profile/11919801458664779971noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-14487782340062351782015-03-21T21:54:27.009+00:002015-03-21T21:54:27.009+00:00I do it a different way. It is similar to prime pa...I do it a different way. It is similar to prime pairing but not the same.<br />Write each number as the product of its prime factors in index form.<br />Put a ring around the highest power of each prime. Multiply the ringed numbers to get the LCM and multiply the non-ringed numbers to get the HCF.<br />eg<br />24 = [2^3] x 3<br />36 = 2^2 x [3^2]<br /><br />LCM = 2^3 x 3^2 = 72<br />HCF = 2^2 x 3Rob Anthonyhttps://www.blogger.com/profile/15871505701835728303noreply@blogger.com