Grasple has multiple check methods using the Computer Algebra System (CAS) which can be used within the editor to indicate when the answer of a student should be marked correct/incorrect. A full list of current options can be found in this article.
This article covers the Is Exact Same Unit check. There are two sections in this article:
When to use the Is Exact Same Unit check?
How does the Is Exact Same Unit check work?
When to use the Is Exact Same Unit check?
If you want to check whether two units are considered to be equivalent AND have the same exact form, you should use this check. This means that 1 kilogram will be equal to 1 kg, but not equal to 1 * 10^3 gram.
This check will check three properties of a unit expression:
The value the unit expression,
The quantity of the unit expression,
The precision of the unit expression (see this section on how this is determined)
The check will verify whether these properties are exactly the same (see below for links to more details). If the form of the unit expression is not important, use the Is Equivalent Unit check.
How does the Is Exact Same Unit check work?
This check will consider two unit expressions to be exactly the same to each other if all three properties are exactly the same. This means that:
the values should be the same exact form
the quantities should be exactly the same
the precisions should be equal to each other
Questions or Feedback
Do you want to know more about this check, whether you should use it for your exercise or any of the other checks? Please let us know via the chat icon in the right bottom of the screen!