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- AU Year 5 Maths
- Representing Numbers

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Get Started Now- 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

In this lesson, we will learn:

- How to write different types of numbers as words
- numbers, multi-digit numbers, fractions, decimals, money amounts

- Writing numbers as their
**word names**requires some memorization!

- The numbers 13 to19 all have the same ending of “
” (fifteen, sixteen, etc.)**-teen** - All multiples of 10 from 20 to 90 end with “
” (thirty, forty, fifty, etc.)**-ty** - Numbers from 21 to 99 have a
in between (thirty-three, seventy-one, etc.)__dash__

- 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. $\frac{2}{9}$ = “two–ninths” vs. $\frac{1}{5}$ = “one–fifth”
- Multi-digit fractions ex. $\frac{43}{71}$ = “forty-three seventy-firsts” (
dash in between)**NO** - Improper fractions ex. $\frac{11}{7}$ = “eleven–sevenths”
- Mixed fractions ex. 6$\frac{3}{5}$ = “six and three–fifths” (write “
**and**” after whole number) - Special fraction names ex. $\frac{1}{2}$ = “one–half”; $\frac{3}{2}$ = “three–halves”; $\frac{1}{4}$ = “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)$\frac{5}{8}$b)$\frac{14}{21}$c)$\frac{287}{345}$d)$\frac{94}{72}$e)$\frac{67}{53}$f)8$\frac{3}{4}$g)5$\frac{1}{2}$ - 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.