Number Names up to 100
Number names are the words we use to say and write numbers. In Class 2, children learn to read and spell the number names from 1 to 100.
Knowing number names helps in reading prices, writing cheques, and understanding word problems. It also builds strong number sense.
What is Number Names up to 100 - Class 2 Maths (Place Value (Grade 2))?
A number name is the word form of a number. For example, 25 is written as twenty-five and 100 is written as one hundred.
Number names 1 to 20 must be memorised:
| Number | Name | Number | Name |
|---|---|---|---|
| 1 | One | 11 | Eleven |
| 2 | Two | 12 | Twelve |
| 3 | Three | 13 | Thirteen |
| 4 | Four | 14 | Fourteen |
| 5 | Five | 15 | Fifteen |
| 6 | Six | 16 | Sixteen |
| 7 | Seven | 17 | Seventeen |
| 8 | Eight | 18 | Eighteen |
| 9 | Nine | 19 | Nineteen |
| 10 | Ten | 20 | Twenty |
Tens names (used for 21–99): Twenty, Thirty, Forty, Fifty, Sixty, Seventy, Eighty, Ninety.
For numbers 21–99, say the tens name then the ones name: 37 = thirty-seven.
Solved Examples
Example 1: Example 1: Write the number name of 34
Question: Write 34 in words.
Think:
- 34 has 3 tens → thirty
- 34 has 4 ones → four
- Join them: thirty-four
Answer: 34 = Thirty-four.
Example 2: Example 2: Write the numeral for seventy-eight
Question: Write seventy-eight as a number.
Think:
- Seventy = 70
- Eight = 8
- 70 + 8 = 78
Answer: Seventy-eight = 78.
Example 3: Example 3: Spell the number 15
Question: How do you spell 15?
Think:
- 15 is a special teen number
- It is NOT "fiveteen" — it is "fifteen"
Answer: 15 = Fifteen.
Example 4: Example 4: Meera’s age
Question: Meera’s grandmother is 67 years old. Write 67 in words.
Think:
- 6 tens = sixty
- 7 ones = seven
- sixty + seven = sixty-seven
Answer: 67 = Sixty-seven.
Example 5: Example 5: What number is forty?
Question: Write forty as a numeral.
Think:
- Forty means 4 tens and 0 ones
- Be careful: it is "forty" NOT "fourty"
Answer: Forty = 40.
Example 6: Example 6: Write 100 in words
Question: Write 100 in words.
Think:
- 100 is a special number — the first 3-digit number
- It is 10 groups of 10
Answer: 100 = One hundred.
Example 7: Example 7: Fill the blank
Question: Fifty-___ = 53. What word goes in the blank?
Think:
- 53 = 50 + 3
- 50 = fifty, 3 = three
- 53 = fifty-three
Answer: The blank is three. Fifty-three = 53.
Key Points to Remember
- Number names 1 to 20 are unique words that must be memorised.
- For numbers 21 to 99, use the tens name + ones name pattern (e.g., thirty-six).
- Common spelling traps: forty (not fourty), eight (not eght), twelve (not twelf).
- 100 = one hundred.
- A hyphen (-) is used between the tens and ones word: twenty-one, not twenty one.
Practice Problems
- Write 49 in words.
- Write the numeral for eighty-six.
- Spell the number name for 12.
- Kavi is on page 91 of his book. Write 91 in words.
- Write the number for "one hundred."
- True or false: 40 is spelled "fourty."
Frequently Asked Questions
Q1. What are number names?
Number names are the words used to write numbers. For example, 7 is "seven" and 56 is "fifty-six."
Q2. How do I write number names for numbers 21 to 99?
Use the tens word first, then a hyphen, then the ones word. Example: 43 = forty-three. If the ones digit is 0, just use the tens word alone: 80 = eighty.
Q3. Why is 40 spelled forty and not fourty?
This is a common English spelling exception. The word "forty" drops the "u" from "four." Children must memorise this.
Q4. What is the number name for 100?
100 is written as "one hundred." It means 10 groups of 10 or 1 group of 100.
Q5. Why are 11 to 19 different from other numbers?
Numbers 11 to 19 have special names (eleven, twelve, thirteen...) that do not follow the tens-ones pattern. They must be memorised separately.
Q6. Do I need a hyphen in number names?
Yes, for two-word number names from 21 to 99, use a hyphen: twenty-one, thirty-five, ninety-nine. Single-word names like ten, eleven, or twenty do not need a hyphen.
