Word names

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. $\frac{2}{9}$ = “two–ninths” vs. $\frac{1}{5}$ = “one–fifth”
• Multi-digit fractions ex. $\frac{43}{71}$ = “forty-three seventy-firsts” (NO dash in between)
• 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