Using these unit vectors helps one keep track of the direction of the components. This means that I can write the above example for vector A as: An Example: I think you are ready for a real example.

And if we wanted to add or subtract two vectors, that's easy enough -- we just separate them each into their component parts and add or subtract each component separately.

Practise using vector components when adding, subtracting or calculating the magnitude of vectors ahead of your National 5 Maths exam.