Which tool is essential for improving speed in the mathematics section?

Using a calculator when permitted is essential for improving speed in the mathematics section because it allows you to perform calculations more quickly and efficiently than doing them manually. Calculators can handle arithmetic operations, complex functions, and even graph-related tasks that might take significant time if done by hand. This can lead to better time management during a timed test, enabling you to focus on understanding and solving problems rather than getting bogged down with calculations.

In a testing scenario, especially when the mathematics involved can be intricate or when multiple steps are required, a calculator streamlines the process, allowing candidates to dedicate their mental resources to strategizing approaches to the problems instead. Thus, leveraging a calculator appropriately maximizes both accuracy and speed during the exam.