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Representing numbers: Word names
- Intro Lesson: a9:26
- Intro Lesson: b6:31
- Intro Lesson: c11:30
- Intro Lesson: d6:28
- Intro Lesson: e2:12
- Lesson: 1a0:43
- Lesson: 1b0:58
- Lesson: 1c1:20
- Lesson: 1d1:50
- Lesson: 2a1:44
- Lesson: 2b2:18
- Lesson: 2c2:51
- Lesson: 2d3:14
- Lesson: 3a1:44
- Lesson: 3b1:37
- Lesson: 3c2:25
- Lesson: 3d1:41
- Lesson: 3e2:08
- Lesson: 3f2:36
- Lesson: 3g1:19
- Lesson: 4a6:41
- Lesson: 4b3:40
- Lesson: 4c4:09
- Lesson: 5a1:41
- Lesson: 5b1:58
- Lesson: 5c2:23
- Lesson: 65:29
Representing numbers: Word names
Lessons
In this lesson, we will learn:
- How to write different types of numbers as words
- numbers, multi-digit numbers, fractions, decimals, money amounts
Notes:
- Writing numbers as their word names requires some memorization!

- The numbers 13 to19 all have the same ending of “-teen” (fifteen, sixteen, etc.)
- All multiples of 10 from 20 to 90 end with “-ty” (thirty, forty, fifty, etc.)
- Numbers from 21 to 99 have a dash in between (thirty-three, seventy-one, etc.)
- When you write the word names for big multi-digit numbers:
- Look at each group of 3 place values.
- Name the number made by 3 digits and add the type of place value at the end
Ex. 7, 186, 493 = “seven million one hundred eighty-six thousand four hundred ninety-three”

- When you write fractions as their word names, follow the format: [numerator] – [denominator as an ordinal] [add ‘s’ at the end unless numerator is 1]
- Proper fractions ex. 92 = “two–ninths” vs. 51 = “one–fifth”
- Multi-digit fractions ex. 7143 = “forty-three seventy-firsts” (NO dash in between)
- Improper fractions ex. 711 = “eleven–sevenths”
- Mixed fractions ex. 653 = “six and three–fifths” (write “and” after whole number)
- Special fraction names ex. 21 = “one–half”; 23 = “three–halves”; 41 = “one–quarter”
- There are 3 ways to write decimals as their word names:
- Ex. 0.87
- Reading method: “zero point eight seven”
- Separate method: eight tenths seven hundredths
- Condensed method: eighty-seven hundredths
- Money amounts are a special type of decimal, their word names name the dollar amount and then the cents amount.
- Ex. $35.46 = thirty-five dollars and forty-six cents
- IntroductionIntroduction to Number Word Names:a)How to write numbers 0-100 as their word namesb)Writing big multi-digit numbers as word namesc)Writing different types of fractions as word namesd)Three methods to write decimals as word namese)Writing money amounts as word names
- 1.Representing Numbers (up to 1000s) Using Word Names
Write the number as its word name (using letters):a)18b)63c)752d)4,921 - 2.Representing Numbers (up to 1000s) Using Word Names
Write the multi-digit number as its word name (using letters):a)26,178b)345,912c)5,731,968d)1,024,037 - 3.Representing Fractions Using Word Names
Write the fraction as its word name (using letters):a)85b)2114c)345287d)7294e)5367f)843g)521 - 4.Representing Decimals Using Word Names
Write the decimal as its word name (using letters):- Recall that there are 3 methods for naming decimals
a)0.07b)2.084c)41.59 - 5.Representing Money Amounts Using Word Names
Write the money amount as its word name (using letters):a)$35.96b)$2,488.71c)$6,092.34 - 6.Number Word Names - Word Problem
Read the passage. Rewrite the number word names in standard form.- Melanie is doing a science project on butterflies. She learned that their life cycle has four stages: egg, caterpillar, pupa, and adult. She also learned that the oldest butterfly fossils come from fifty-six million years ago. There are about eighteen thousand five hundred butterfly species in the world. She also raised some monarch butterflies and measured them to have a wingspan of about three point nine inches and a weight of about seven tenths four hundredths grams.