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Algebra is the branch of mathematics that uses symbols (like letters) to represent numbers in formulas and equations. It helps us find unknown values and understand relationships between different quantities.
The customary system in the U.S. includes units like feet, pounds, and fluid ounces, but science and medicine rely on the metric system, using liters, grams, and meters. Understanding both systems and their conversions is essential for accurate measurements in healthcare and scientific applications.
This topic covers how to confidently work with numbers in their three most common forms: Whole Numbers – Numbers without fractions or decimals (e.g., 10, 75). Decimals – Numbers that include a decimal point (e.g., 3.14, 0.5). Fractions – Numbers expressed as parts of a whole (e.g., ½, 3/4). We’ll break these down, build conceptual clarity, and integrate practical nursing examples along the way.
Decimals and percentages appear throughout the HESI A2 math section. You must understand how to convert between decimals, fractions, and percentages, and perform calculations involving these values accurately and efficiently.
Fractions, ratios, and proportions are essential components of the HESI A2 math section. You'll need to understand how to simplify, compare, and operate with these values to solve real-world problems, including dosage calculations and unit comparisons.
Measurement conversions are a key component of the HESI A2 math section. You are expected to understand and convert between various units of measurement within both the metric and U.S. customary systems, and sometimes between the two.
About half of the TEAS 7 math questions focus on basic number concepts, including the four basic operations and their application in word problems. These questions involve positive and negative whole numbers, fractions, percentages, and decimals.
