Number Writing Exercise 🔢

When using numbers to refer to more than one category, reserve figures for some categories and spelled-out words for others. Never mix spelled-out numbers and figures for a particular category.

Standard Number Writing Practices

DATES August 6, 1941
1732–1845
from 34 BC to AD 230
ADDRESSES 10 Downing Street
237 North 8th Street
Export Falls, MN 92025
TIMES 8:09 a.m., 6:00 p.m.
six o’clock
four in the afternoon
DECIMALS/FRACTIONS 0.01
98.6
3.1416
7/8
12 1/4
a sixth
three-quarters
CHAPTERS/PAGES Chapter 27, page 2
p. 1023 or pp. 660–62
ACT/SCENE act 2, scene 2
lines 75–79
TEMPERATURES 40°F
-5°F
20° Celsius
MONEY $1.2 billion
$3.41
25¢
$10,000
STATISTICS 29%
5:1 ratio
1 percent level
MEASUREMENTS 67.8 mph
2 teaspoons
8-by-10-inch photo
1.5 gallons

Key Rules:

  • Use hyphens for two-word numbers (twenty-one through ninety-nine)
  • Maintain consistency within number categories
  • Use figures for dates, addresses, decimals, and statistics
  • Spell out numbers at sentence beginnings