Adding (and Subtracting) Fractions Tips

The “standard” way to add (or subtract) fractions is to put them over a common denominator first. So, the fraction problem

3 over 10plus 1 over 15
is

9 over 30plus 2 over 30

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Flat Bread Fractions

Some time ago, I posted a fractions puzzle involving flat bread. You can read about it here. Here’s the question – if I take a flat piece of bread, and give you half, then you give me back a quarter, then I give you back an eighth, and you give me back 1/16, and so on ad infinitum, how much of the original flat bread do I have?

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Dinosaur Dodger Tips and Strategy

I recently uploaded a game I call “Dinosaur Dodger“. It’s based on an interesting paradox I read about on this blog, by an economist who has authored a number of good books. The paradox is called the “Paradox of the Absent Minded Driver”. It goes like this : imagine a driver, driving home along a highway. They need to take the second exit to get off, but for some reason they can’t recall which exit they are at when they get to an exit.

The Absent Minded Driver paradox, and Dinosaur Didger, involve finding the best strategy to get home on this track
The Absent Minded Driver paradox, and Dinosaur Didger, involve finding the best strategy to get home on this track

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