HESI A2 Mathematics Study Guide
The arithmetic nursing school runs on: fractions, decimals, ratios, percentages, dosage conversions and the algebra behind them.
55 questions · 50minutes on the real exam · 6 units · 16 lessons · updated July 2026
Whole Numbers
~20% of the sectionAdd, subtract, multiply and divide whole numbers cleanly, regrouping and all.
Fractions
~20% of the sectionLockedReduce, compare and do arithmetic with proper, improper and mixed numbers.
Decimals
~18% of the sectionLockedWork with decimal place value and convert cleanly between decimals and fractions.
Ratios, Proportions and Percentages
~12% of the sectionLockedSet up proportions and solve percentage problems with the part-whole formula.
Measurement and Conversions
~12% of the sectionLockedConvert between household and metric units, and read military time, Roman numerals and temperature.
Algebra and Statistics
~18% of the sectionLockedFollow the order of operations, solve for a variable, and find mean, median and mode.
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