LCM – Jon Oaks

18 Jun

Least Common Multiple Example

By Jon OaksUncategorizedLCM

There are two ways to find the LCM given in the textbook (Basic Mathematical Skills with Geometry, 8th Ed. by Baratto and Bergman) Let's look at example #4 on page 192 in a little more detail. One way of doing this problem would be the 'Listing Method'. So, to find the LCM of 10 and 18, we could do the following: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, etc... 18, 36, 54, 72, 90, 108, 126, 144, 162, 180, etc... Note that 90 is the LCM, but 180 is also in common, it's…

Links from the Week – including a LCM/GCF Competition-Style Idea

By Jon OaksUncategorizedActivity, Calculator, Calculus, Clock, Desktop Sharing, Games, GCF, History, Infographics, LCM, Online, Statistics, Video, Wolfram|Alpha

Sometimes I wonder how many people actually find this more annoying than useful. 1. Maple Worksheets for Calculus - In addition to the Applets which I previously posted about, there St. Louis University also has a series of Maple Worksheets for Calculus that could prove to be useful. That is, if Maple is your thing. 2. How Much Does It Cost to Go to the SuperBowl and The History of the SuperBowl are potentially two useful Infographics for about this time of year that could provide for some discussion on Sports Statistics, etc. Although, I mainly just thought they were incredibly…

GCF, LCM, and Order of Operations

By Jon OaksUncategorizedApplication, GCF, LCM, Order of Operations

In my Basic Mathematics class we just finished discussing the order of operations, and students always seem to have a problem with it, especially when division comes before multiplication (Sally has always told them otherwise). Today we discussed finding the Greatest Common Factor (GCF) and Least Common Multiple (LCM), another topic that students sometimes seem to have a problem with. I came up with the following problem, which sparked quite a lot of discussion in the classroom. But more than that, I think it is the type of problem that continues to reiterate the Order of Operations, and doesn't back…