In the math section of the HESI A2, what calculations are commonly tested?

The correct choice focuses on basic arithmetic, fractions, ratios, and percentages because these foundational math skills are essential for many real-life applications and are frequently tested in standardized assessments like the HESI A2. Mastery of basic arithmetic allows for the efficient manipulation of numbers and forms the basis for understanding more complex mathematical concepts.

Fractions are important as they are commonly encountered in various contexts, such as measuring ingredients, calculating dosages in nursing, and interpreting data. Ratios and percentages are also crucial, particularly in healthcare settings where understanding medication dosages and interpreting lab results are necessary.

The other areas mentioned, such as advanced calculus and algebra or geometry and trigonometry, are typically not the focus of the HESI A2 because the exam aims to assess practical math skills that are more relevant to nursing and health science fields. Similarly, while statistics and probability might be of interest, they are not usually central to the fundamental math skills tested on this particular assessment. Hence, the emphasis is placed on those basic arithmetic concepts that support everyday calculations in a nursing career.