Spell out numbers one through one hundred (Chicago's general rule). A Chicago format paper is doublespaced and leftaligned with paragraphs indented.Everything you need to know to create a Chicago Manual of Style format paper including Chicagostyle citations, with examples. Thank you for your time. A. Chicago's alternative rule for spelling out numbers, like the general rule, applies equally to cardinals and ordinals. Welcome to Decimal Expanded Form, Word Form, and Standard Form with Mr. J! This section discusses numbers, how to write them correctly, and when to use numerical expressions instead. When writing out a number of three or more digits, the word and is not necessary. Decimals are a shorthand way to write fractions and mixed numbers with denominators that are powers of 10 , like 10 , 100 , 1000 , 10000 , etc. You may use numerals in fraction form for cents.