Step by step
The question
Question: write 21 in words.
Write 21 in words
1 Split into tens and ones
21 is 2 tens and 1 one.
That is 20 and 1.
21 = 20 + 1
2 Say each part
20 is twenty.
20 → twenty
1 is one.
1 → one
3 Write the word
We join them with a dash: twenty-one.
= twenty-one
4 Check
We read it back.
Twenty is 20, one is 1.
Together 21.
Yes!
It works.
twenty-one → 20 + 1 = 21
Let's look back.
First: split into tens and ones.
Then: say each part.
Then: write the word.
Last: check.
Answer
= twenty-one