How many decimal places should I use in the exams?

When answering short answer and calculation questions… How many decimal places should we use? 4dp? 2dp? Also do you think it’s okay to answer for example $2.5355M rather than $2,535,558?

No standard answer. In general, I will use two, in AM and PM. Be careful when using $1 base in swap, forward, etc.

By the way, ‘m’ could mean Million or Thousand. ‘mm’ could mean Million.