Mirror, Signal, Manoeuvre
One of the things we find difficulty getting over to our students is the importance of setting their working out, or even showing working at all.
I train my students in a format called 'Mirror, Signal, Manoeuvre'. The obvious reason for using this well-known phrase is that it is well-known and my students are eager to start driving lessons (or have started) and so it should be fairly near the surface.
Write out the data given in the question, CONVERT TO SI if necessary and assign a symbol
Write out the formula/formulae you will use
Rearrange, plug in the numbers and ....
MAKE SURE YOU HAVE WRITTEN DOWN THE ANSWER TO THE QUESTION ASKED!