I’ve written about a pretty awful MyMaths question before and this is another post about MyMaths – I promise I will keep it brief.
When I saw the screen shot below that had been tweeted by Michelle MacDonagh (@michellemacd) I genuinely thought it was a photoshop by someone. Alas, it turns out that this is not the case: 
For a product aimed at the maths education market to promote this idea in any way is unbelievable.
To be fair to MyMaths, clicking through reveals the next part
Personally, I don’t think this mitigates what is at the top of the page. Many students will be looking at this lesson on their own, and perhaps not pick up on the obvious untruths that have been written above.
Unfortunately, clicking next one more time reveals this ridiculous pearl of wisdom from MyMaths
What a great way to promote the importance of understanding behind a concept…
I cannot think of any justification for this… I would be very interested to hear MyMath’s reasoning behind this.