The long division notebook is covered in eraser shavings. Writing and erasing, then writing and erasing again. It takes 5 minutes for one problem, and it's still wrong. I am a former elementary school ...

Knowing your multiplication facts is very useful, but what happens when the numbers you are multiplying are greater than those in your multiplication tables? You will need to calculate using a column ...

A year later, it was dubbed iPhone OS 1, which was pretty boring. By 2010, marketing got its act together and came up with "iOS," just in time for the debut of version 4. Apple's iOS is so full of ...

It's flexible enough to realize that an "x" and a "*" can both be used for multiplication. It can even handle operations such as 9^2 (9 squared, which equals 81) or 9% 100 (9, which is 9% of 100).