My Study Stuff

29/02/2012

When are hyphens used with numbers?

Filed under: Extra — anlactunay @ 7:53 PM

“When are hyphens used with numbers? Is it 13 feet or 13-feet; 12 hours or 12-hours?”

Rule: Generally, hyphenate between two or more adjectives when they come before a noun and act as a single idea.

This rule can also be applied when a number and a measurement unit taken together form an adjective, that is, when they describe another object.

Examples:
A 22-inch monitor is too big for my desk.
Nurses work 12-hour shifts.
Anthony swung his five-pound hammer.

In the previous sentences, the measurements, such as 22-inch, describe specific objects, such as monitor.
When measurements are not acting as adjectives, hyphens are not needed.

Examples:
Suzanne won the race by 25 yards.
Twelve hours later, she was exhausted.
Anthony’s hammer weighs five pounds.

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