Numbers & Abbreviations in WritingATI TEAS 7 cheat sheet

Conventions

8 key facts 1 practice questions Reviewed Oct 2026

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Numbers

Spell out one through nine; use numerals for 10 and above
Always spell out a number that starts a sentence
Use numerals for doses, measurements and times

Abbreviations

Define on first use: 'blood pressure (BP)'
Avoid abbreviations flagged as unsafe in clinical writing

Units

Space between number and unit: 5 mg
Never pluralize a unit symbol

Consistency

Pick one convention and hold it through the document

Key takeaway

Conventions

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Which word is spelled correctly?

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