Calculate
Definition
Work out a numerical answer, showing the steps.
Explanation
Show the formula, substitution and the answer with units. Marks are often given for method as well as the final answer.
Example
Calculate the area of a circle with radius 3 cm.
In an exam
Command-word meanings can vary between subjects, exam boards and mark schemes, so check your own board's guidance. See Exam Command Words: What Each Instruction Asks For.
Common confusion
Calculate means produce a number. Estimate means give an approximate value.