Numbers and Algebra
This topic covers fractions, decimals, percentages, ratios, proportions, order of operations, equations, inequalities, expressions, and quantitative comparison.
How to study for the ATI TEAS
Build every answer around evidence, units, data, anatomy and physiology, scientific reasoning, grammar rules, and efficient timed elimination.
Core concepts
Concept 1
Numbers and Algebra questions test whether a TEAS candidate can apply core academic skills to nursing and allied-health readiness scenarios.
Exam cue: Identify whether the item is reading, math, science, or English and language usage.
Concept 2
The best answer usually follows the passage, data, rule, equation, scientific relationship, or grammar convention that is directly supported.
Exam cue: Find the controlling evidence: passage detail, equation, table, graph, anatomy relationship, experiment design, or sentence rule.
Concept 3
Eliminate answers that overinfer, ignore units, skip passage evidence, confuse scientific terms, or choose what sounds right without checking the rule.
Exam cue: Use process of elimination for extreme, unsupported, unit-inconsistent, or grammatically mismatched choices.
Risk pitfalls and guardrails
Choosing an answer that is true in general but not supported by the passage or data.
Guardrail: Avoid outside assumptions, unit mistakes, graph-scale misses, science term swaps, and sentences that sound polished but break grammar rules.
Losing points to unit conversion, graph scale, sign, decimal, or rounding errors.
Guardrail: Avoid outside assumptions, unit mistakes, graph-scale misses, science term swaps, and sentences that sound polished but break grammar rules.
Treating similar science or grammar terms as interchangeable.
Guardrail: Avoid outside assumptions, unit mistakes, graph-scale misses, science term swaps, and sentences that sound polished but break grammar rules.
Memory anchors
Order of Operations
Use parentheses, exponents, multiplication and division, then addition and subtraction.
Fraction
A fraction represents part of a whole or a ratio of two quantities.
Decimal
A decimal represents place value in powers of ten.
Percent
A percent means per one hundred.
Ratio
A ratio compares two quantities.
Proportion
A proportion states that two ratios are equal.
Variable
A variable represents an unknown or changing value.
Equation
An equation states that two expressions are equal.
Inequality
An inequality compares expressions using greater than, less than, or related symbols.
Estimate
Estimation checks whether a calculated answer is reasonable.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Evaluate 18 - 3(4) + 2.
What is 3/4 + 2/3?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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