Other parameters may control how the partial credit is calculated. These are described below. Units specifies what unit will be displayed just after the answer blank in an Arith question. This does not convert answers from one unit to another. It essentially tells the student what units his answer should be in.
Size specifies the size of the answer blanks provided.
Maxlength specifies the maximum length of answer accepted. This lets Mallard evaluate the student's answers, so the blank may be used as a calculator. The blank cannot be used as a calculator. This specifies the number of decimal places to round the answers to. The default rounds to 2 decimal places.