Representing numbers: Word names

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  1. Introduction to Number Word Names:
  2. How to write numbers 0-100 as their word names
  3. Writing big multi-digit numbers as word names
  4. Writing different types of fractions as word names
  5. Three methods to write decimals as word names
  6. Writing money amounts as word names
  1. Representing Numbers (up to 1000s) Using Word Names
    Write the number as its word name (using letters):

    1. 18
    2. 63
    3. 752
    4. 4,921
  2. Representing Numbers (up to 1000s) Using Word Names
    Write the multi-digit number as its word name (using letters):

    1. 26,178
    2. 345,912
    3. 5,731,968
    4. 1,024,037
  3. Representing Fractions Using Word Names
    Write the fraction as its word name (using letters):

    1. 58\frac{5}{8}
    2. 1421\frac{14}{21}
    3. 287345\frac{287}{345}
    4. 9472\frac{94}{72}
    5. 6753\frac{67}{53}
    6. 834\frac{3}{4}
    7. 512\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
      1. 0.07
      2. 2.084
      3. 41.59
    • Representing Money Amounts Using Word Names
      Write the money amount as its word name (using letters):

      1. $35.96
      2. $2,488.71
      3. $6,092.34
    • 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.
    Topic Notes

    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!
    Representing Numbers : Word Names
      • 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”

    Representing Numbers : Word Names

    • 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. 29\frac{2}{9} = “two–ninths” vs. 15\frac{1}{5} = “one–fifth”
      • Multi-digit fractions ex. 4371\frac{43}{71} = “forty-three seventy-firsts” (NO dash in between)
      • Improper fractions ex. 117\frac{11}{7} = “eleven–sevenths”
      • Mixed fractions ex. 635\frac{3}{5} = “six and three–fifths” (write “and” after whole number)
      • Special fraction names ex. 12\frac{1}{2} = “one–half”; 32\frac{3}{2} = “three–halves”; 14\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