Final answer:
The recommended course of action if errors are found on a worksheet is to erase and correct them before further work. Consulting a supervisor for guidance is advisable in the case of significant or unfamiliar errors.
Step-by-step explanation:
If errors are found on a worksheet, the recommended course of action is to erase and correct them before further work. Ignoring the errors can lead to inaccurate results or misunderstandings. However, if the errors are significant or unfamiliar, it is advisable to consult a supervisor for guidance to ensure the correct approach is taken.