9: Numbers
- Overview and additional resources
- Chicago’s general rule—zero through one hundred
- An alternative rule—zero through nine
- Hundreds, thousands, and hundred thousands
- Number beginning a sentence
- Ordinals
- Consistency and flexibility
- Millions, billions, and so forth
- Powers of ten
- “Mega-,” “giga-,” “tera-,” and so forth
- Binary systems
- Use of “dex”
- Physical quantities in general contexts
- Simple fractions
- Whole numbers plus fractions
- Numbers with abbreviations and symbols
- Units for repeated quantities
- Percentages
- Decimal fractions and use of the zero
- Words versus monetary symbols and numerals
- Non-US currencies using the dollar symbol
- British currency
- Other currencies
- Large monetary amounts
- Currency with dates
- Page numbers, chapter numbers, and so forth
- Volume, issue, and page numbers for periodicals
- Numbered divisions in legal instruments
- The year used alone
- The year abbreviated
- Month and day
- Centuries
- Decades
- Eras
- All-numeral dates and other brief forms
- ISO style for dates
- Numerals versus words for time of day
- Noon and midnight
- The twenty-four-hour system
- ISO style for time of day
- Numerals for monarchs, popes, and so forth
- Numerals with personal names
- Numbers for sequels
- Vehicle and vessel numbers
- Numbers for successive governments
- Numbered political and judicial divisions
- Numbered military units
- Numbered places of worship
- Unions and lodges
- Numbered highways
- Numbered streets
- Building and apartment numbers
- Plural numbers
- Comma between digits
- The decimal marker
- Space between digits (SI number style)
- Telephone numbers
- Ratios
- Numbered lists and outline style
- The en dash for inclusive numbers
- Abbreviating, or condensing, inclusive numbers
- Alternative systems for inclusive numbers
- Inclusive numbers with commas
- Inclusive years
- Roman numerals—general principles
- The advent of subtrahends (back counters)
- Chicago’s preference for arabic rather than roman numerals