HESI A2 Math: Quick Study Guide in 20 Minutes
Master key math concepts for the HESI A2 with a focused review.
As you prepare for the HESI A2, one of the best strategies to tackle the mathematics section is to focus on core concepts and problem-solving techniques. Whether you have a full day or just 20 minutes, this guide will help you hone in on essential skills with clarity and confidence. Let's dive right into it!
Solve Linear Equations
Linear equations are a staple of the HESI A2 math section. Take the equation `3x - 5 = 10`. To solve for `x`, start by isolating the term with `x` on one side of the equation. Add `5` to both sides to get `3x = 15`. Next, divide each side by `3` to solve for `x = 5`.
Why it matters: Linear equations test your ability to manipulate algebraic expressions. Watch out for common errors like forgetting to distribute negatives or making arithmetic mistakes during your calculations.
Understand Ratios and Angles
Consider a triangle with angles in the ratio `2:3:4`. Since the angles of a triangle always sum to `180` degrees, break down the ratio into parts: `2x + 3x + 4x = 180`. Simplifying gives `9x = 180`, so `x = 20`. This means the angles are `40`, `60`, and `80` degrees, with `80` being the largest.
Why it matters: Ratios help you unlock relationships between numbers, a useful skill for many real-world nursing scenarios.
Spot Patterns in Sequences
The sequence `2, 6, 12, 20,...` follows a pattern where each number is obtained by adding consecutive even numbers. Start with `2 + 4 = 6`, then `6 + 6 = 12`, and `12 + 8 = 20`. The next step is `20 + 10 = 30`.
Why it matters: Recognizing patterns can simplify complex problems and is a skill you can apply in patient assessments and data evaluation.
Simplify Algebraic Expressions
To simplify an expression like `(3x^2 - 2x + 1) - (x^2 + 4x - 2)`, distribute the negative sign across the terms in the second set of parentheses: `3x^2 - x^2` and `-2x - 4x` and `1 + 2`. Combine like terms to get `2x^2 - 6x + 3`.
Why it matters: Simplification skills come in handy, not just in exams, but in understanding medical dosages and calculations.
Calculate Perimeters and Areas
For a square with a perimeter of `36` inches, understand that each side is equal, and the perimeter is `4` times a side's length. Divide `36` by `4` to find each side measures `9` inches.
Similarly, for a triangle with a base of `10` cm and height of `8` cm, use the formula `1/2 * base * height`. This gives you an area of `40` cm².
Why it matters: Geometry skills help with understanding space and volume, crucial in fields like wound care and room layout.
Converting Decimals to Fractions
Recognizing that `0.75` is equivalent to the fraction `75/100`, which simplifies to `3/4`, is a fundamental skill. This conversion is essential in medication calculations and interpreting lab values.
Practice Makes Perfect
Mathematics is a skill best improved with practice. By understanding and applying these concepts, you'll feel more confident going into your HESI A2 exam. Remember, practice doesn't just make perfect—it makes permanent.
Feel free to try more practice questions and reinforce your skills by visiting NursingSchoolQuiz.com. Here, you’ll find plenty of resources tailored to fast-track your exam preparation. Good luck!