Number Names 10 to 20
Every number has a name — the word we use when we read or say it. The number names from 10 to 20 have some special spellings that we must learn carefully.
Some names like Eleven and Twelve are different from the pattern. From 13 onwards, most names end in "-teen".
What is Number Names 10 to 20 - Class 1 Maths (Numbers 10 to 20)?
Here are the number names from 10 to 20:
| Number | Number Name |
|---|---|
| 10 | Ten |
| 11 | Eleven |
| 12 | Twelve |
| 13 | Thirteen |
| 14 | Fourteen |
| 15 | Fifteen |
| 16 | Sixteen |
| 17 | Seventeen |
| 18 | Eighteen |
| 19 | Nineteen |
| 20 | Twenty |
Solved Examples
Example 1: Write the Name for 11
Question: Write the number name for 11.
Think:
- 11 is a special number — it does not end in "-teen"
- It is called Eleven
- Spell: E-L-E-V-E-N
Answer: 11 = Eleven.
Example 2: Write the Name for 15
Question: Write the number name for 15.
Think:
- 15 ends in "-teen"
- But it is Fifteen (not Fiveteen)
- Spell: F-I-F-T-E-E-N
Answer: 15 = Fifteen.
Example 3: Number for 'Eighteen'
Question: Write the number for the word "Eighteen."
Think:
- Eighteen = Eight + teen
- That means 8 ones + 1 ten = 18
Answer: Eighteen = 18.
Example 4: Fill in the Missing Name
Question: Ten, Eleven, ___, Thirteen. What is missing?
Think:
- After Eleven (11) comes 12
- 12 is called Twelve
Answer: The missing name is Twelve.
Example 5: Priya's Class Strength
Question: There are 20 children in Priya's class. Write 20 in words.
Think:
- 20 is called Twenty
- Spell: T-W-E-N-T-Y
Answer: 20 = Twenty.
Example 6: Match Numbers to Names
Question: Match: 14, 17, 19 with their names.
Names: Nineteen, Fourteen, Seventeen
Think:
- 14 → Fourteen
- 17 → Seventeen
- 19 → Nineteen
Answer: 14 = Fourteen, 17 = Seventeen, 19 = Nineteen.
Example 7: Tricky Spelling: Twelve
Question: Spell the number name for 12.
Think:
- 12 has a special name — it is NOT "Twoteen"
- It is Twelve
- Spell: T-W-E-L-V-E
Answer: 12 = Twelve (T-W-E-L-V-E).
Key Points to Remember
- 11 (Eleven) and 12 (Twelve) have special names — they do not follow the "-teen" pattern.
- Numbers 13 to 19 end in "-teen": Thirteen, Fourteen, Fifteen, Sixteen, Seventeen, Eighteen, Nineteen.
- Tricky spellings: Twelve (not Twelv), Fifteen (not Fiveteen), Eighteen (one T, not Eightteen).
- 20 is called Twenty — the first "-ty" number.
Practice Problems
- Write the number names for 12, 16, and 20.
- What number does the name "Fourteen" stand for?
- Fill in: Fifteen, Sixteen, ___, Eighteen.
- Spell the name for 13.
- Match: 11 → Eleven / Elevan / Elaven. Pick the correct spelling.
- Write all number names from Ten to Twenty in order.
Frequently Asked Questions
Q1. Why are 11 and 12 different from other teen numbers?
Eleven and Twelve come from old English words that are not based on the "-teen" pattern. They are special names that we just need to memorise.
Q2. What does '-teen' mean in a number name?
The suffix "-teen" means "plus ten." For example, Fourteen means Four + Ten (4 + 10 = 14).
Q3. How do you spell 15 correctly?
15 is spelled F-I-F-T-E-E-N (Fifteen). It is NOT "Fiveteen." The "Five" changes to "Fif" in this word.
Q4. How do you spell 18 correctly?
18 is spelled E-I-G-H-T-E-E-N (Eighteen). It has only one T in the middle, not two.
Q5. What is the number name for 20?
20 is called Twenty. It is the first number name that ends in "-ty." After Twenty come Twenty-one, Twenty-two, and so on.
Q6. How can I remember all these names?
Write them out daily. Focus on the tricky ones: Eleven, Twelve, Fifteen, and Eighteen. You can also practise by counting out loud from 10 to 20.
