List by Author: Andrew Irving and Ebrahim Patel

So you think you can add up?
Why do we add fractions the way we do? A very close look at addition reveals the answer — and it also works for negative numbers.
Why the answer to any sum is 10
Learning mathematics involves a progression to higher and higher concepts, building on the foundations of what we have already learnt. But Andrew Irving and Ebrahim Patel explain that no matter how high your mathematical knowledge reaches you must never lose sight of your foundations, no matter how basic they may seem.