lesson
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Imagine opening a storybook and seeing the number for a giant dragon written out in letters instead of digits!
Every numeral we write with digits like 5 or 42 has its own special number word made of letters.
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Numbers from 1 to 19 have unique names that you say all at once, like eight, eleven, and thirteen.
What happens when we count bigger groups of ten?
The Tens Family
When we count by tens, the number words end in -ty, like twenty, thirty, and forty.
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Watch out for the word forty — it drops the letter 'u', so we write f-o-r-t-y, not fourty!
Now, what if a number has both tens and ones together?
Building Two-Digit Words
To name a two-digit number, say the tens word first, add a little dash called a hyphen, and then say the ones word.
📊Interactive diagram