Showing posts with label tricks. Show all posts
Showing posts with label tricks. Show all posts


Flipping the Script: Simplifying Subtraction with Addition

98 + x = 100 is a better way to understand what 100 - 98 is!

Do you remember being a child and struggling to understand subtraction? Some people find it more challenging to grasp than its counterpart, addition. But what if we flipped the equation? Today, we're going to look at a fresh approach to the classic subtraction problem, using an equation like '100 - 98', to illuminate this concept.
A confused cartoon character looking at '100 - 98' on a blackboard.
Let's consider the equation '100 - 98'. Many people might fumble around with this, especially when first learning about subtraction. But what if we reframe this problem?

100 - 98      BUT     INSTEAD    98 + x = 100

The transformed equation, '98 + x = 100', is the same problem presented differently. It's easier to comprehend, especially for beginners, because it's now in the form of an addition equation. You can see that you just need to add something to 98 to reach 100.
A timeline showing the progression from 98 to 100.
So what's the value of 'x'? Just look at the numbers: to get from 98 to 100, you need to add 2. That's it! 'x' equals 2. Therefore, '100 - 98' also equals 2.
A light bulb appears over a cartoon character's head, illustrating the moment of comprehension.
Flipping the equation helps simplify the problem by making it more intuitive. The cognitive leap from adding to subtracting is not as challenging, making this a useful strategy, especially for those in the early stages of learning math.
A cartoon character Math student confidently solving other subtraction problems by flipping the equation.
With this innovative approach to subtraction, math problems can become less intimidating, paving the way for a more profound understanding of mathematical principles.
A group of cartoon characters, including the first one, happily solving various math problems on a large blackboard.
By embracing these alternative strategies, we open new paths to mathematical mastery, demonstrating that sometimes, flipping the equation is all it takes! So, give yourself a high-five — with the flipped equation '100 - 98' = '98 + x = 100'.
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How to open multiple webpages in tabs on startup in Firefox (3.6.3) on a Mac

If you want more than one homepage to load when you start Firefox, say your favorite news sites, for example, then this little tip may be useful so you don't have to manually load the pages every single time.
  1. Go to Preferences on Mozilla Firefox

2. Select the “General” pane in the taskbar.  In the location (s) field you probably already have your default home page.

 3.  In the homepage field type in your desired web pages separated by the | key.
4. Voila. You're done. Now when you open Firefox all your favorite web pages will open in tabs.

* Caveat: If you are not sure you want tabs to open with the same web pages EVERY time you start up Firefox, and you want more control over your morning routine, then click here to learn how to create a bookmark to open in tabs.

How to set up a bookmark folder in Firefox (3.6.3) to open your favorite sites in tabs on a Mac

In a previous post, I demonstrated how to open multiple web pages in Firefox in tabs on startup, but if you're like me, sometimes it is just annoying to have your new sites pop up every time you open up an application, so this trick may serve people better who may only want pages to open in the morning and a certain set of pages to open in the evening. Or set up pages to open for a specific task, like research a paper, for example.