If you specify a unit of measure and use an abbreviation or a symbol, always use a numeral with it - do not spell the number out.
- 5 mi
- 6 h
- 16 mm movies
- He is 6′9″ tall
For two or more quantities, the abbreviation or symbol is repeated if it is closed up to the number but not if it is separated.
- 10%-25%
- 32°F-212°F
- 3 x 5 cm
- 2 x 6 in
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