Maths

Number Names

Class 3

🎯 Learning Objectives

Write number names for numbers 1 to 100.
Write number names for hundreds (100 to 999).
Write number names for thousands (1,000 to 9,999).
Understand the Indian number system (ones, tens, hundreds, thousands).
Apply rules for writing number names (hyphen for 21–99).
Convert numbers to words and words to numbers.
Use number names in real-life situations like cheque writing and price tags.

📖 Introduction

When Arjun's father writes a cheque for ₹2,450, he must write the amount in words: Two Thousand Four Hundred Fifty. When we read a price tag at a shop, we see numbers like ₹375. But how do we say this number? Three Hundred Seventy-Five.

In Class 2, we learned number names up to 50. Now in Class 3, we will learn to write number names for numbers up to 9,999 (nine thousand nine hundred ninety-nine). This is an important skill used in daily life — from reading bus numbers to understanding population figures!

Recap: Number Names 1 to 20

Let us quickly revise the number names from 1 to 20. These are the building blocks for all larger numbers:

Colourful chart showing number names from 1 to 20

Number	Name	Number	Name	Number	Name	Number	Name
1	one	6	six	11	eleven	16	sixteen
2	two	7	seven	12	twelve	17	seventeen
3	three	8	eight	13	thirteen	18	eighteen
4	four	9	nine	14	fourteen	19	nineteen
5	five	10	ten	15	fifteen	20	twenty

Remember: Numbers 1–12 have unique names. Numbers 13–19 end in "-teen". These must be memorised!

Tens Names (Multiples of 10)

The tens names are the foundation for writing two-digit numbers:

Number	Name	Number	Name
10	ten	60	sixty
20	twenty	70	seventy
30	thirty	80	eighty
40	forty	90	ninety
50	fifty	100	one hundred

Spelling alert! It is forty (NOT "fourty") and ninety (NOT "ninty"). These are common mistakes!

Number Names 21 to 99 (Two-Digit Numbers)

For numbers from 21 to 99, we follow a simple pattern:

Rule: Tens name + hyphen (-) + ones name

Examples:
21 = twenty-one    35 = thirty-five    48 = forty-eight
56 = fifty-six    63 = sixty-three    79 = seventy-nine
84 = eighty-four    92 = ninety-two    99 = ninety-nine

Important: Always use a hyphen (-) between the tens name and ones name for numbers 21 to 99. For example: twenty-one, not "twenty one".

Exception: Round tens (20, 30, 40... 90) are written as single words without a hyphen.

Step-by-step: Write the number name of 67
Step 1: Find the tens digit → 6 → sixty
Step 2: Find the ones digit → 7 → seven
Step 3: Combine with hyphen → sixty-seven

Number	Name	Number	Name
21	twenty-one	61	sixty-one
33	thirty-three	72	seventy-two
45	forty-five	85	eighty-five
57	fifty-seven	99	ninety-nine

Number Names for Hundreds (100 to 999)

Now let us learn to write three-digit numbers in words. The key word here is "hundred".

Pattern: [Ones name] Hundred [Tens-Ones name]

Examples of round hundreds:
100 = One Hundred    200 = Two Hundred    300 = Three Hundred
400 = Four Hundred    500 = Five Hundred    600 = Six Hundred
700 = Seven Hundred    800 = Eight Hundred    900 = Nine Hundred

For numbers that are not round hundreds:

Write the number name of 356:
Step 1: Hundreds digit = 3 → Three Hundred
Step 2: Remaining number = 56 → Fifty-Six
Step 3: Combine → Three Hundred Fifty-Six

Write the number name of 409:
Step 1: Hundreds digit = 4 → Four Hundred
Step 2: Tens digit = 0 (skip it)
Step 3: Ones digit = 9 → Nine
Step 4: Combine → Four Hundred Nine

Write the number name of 810:
Step 1: Hundreds digit = 8 → Eight Hundred
Step 2: Remaining = 10 → Ten
Step 3: Combine → Eight Hundred Ten

In the Indian system, we do NOT use "and" between hundred and the remaining number. We write "Three Hundred Fifty-Six" (not "Three Hundred and Fifty-Six"). The "and" is used in British English but not in Indian number writing.

Number	Number Name
125	One Hundred Twenty-Five
230	Two Hundred Thirty
347	Three Hundred Forty-Seven
502	Five Hundred Two
618	Six Hundred Eighteen
750	Seven Hundred Fifty
999	Nine Hundred Ninety-Nine

Number Names for Thousands (1,000 to 9,999)

The biggest numbers we will learn in Class 3 are four-digit numbers. The key word is "thousand".

Pattern: [Ones name] Thousand [Hundreds] [Tens-Ones]

Round thousands:
1,000 = One Thousand    2,000 = Two Thousand    3,000 = Three Thousand
4,000 = Four Thousand    5,000 = Five Thousand    6,000 = Six Thousand
7,000 = Seven Thousand    8,000 = Eight Thousand    9,000 = Nine Thousand

For numbers that are not round thousands:

Write the number name of 2,450:
Step 1: Thousands digit = 2 → Two Thousand
Step 2: Hundreds digit = 4 → Four Hundred
Step 3: Remaining = 50 → Fifty
Step 4: Combine → Two Thousand Four Hundred Fifty

Write the number name of 7,036:
Step 1: Thousands digit = 7 → Seven Thousand
Step 2: Hundreds digit = 0 (skip "hundred")
Step 3: Remaining = 36 → Thirty-Six
Step 4: Combine → Seven Thousand Thirty-Six

Write the number name of 5,008:
Step 1: Thousands digit = 5 → Five Thousand
Step 2: Hundreds = 0, Tens = 0 (skip both)
Step 3: Ones = 8 → Eight
Step 4: Combine → Five Thousand Eight

Number	Number Name
1,234	One Thousand Two Hundred Thirty-Four
2,450	Two Thousand Four Hundred Fifty
3,007	Three Thousand Seven
4,500	Four Thousand Five Hundred
6,789	Six Thousand Seven Hundred Eighty-Nine
8,100	Eight Thousand One Hundred
9,999	Nine Thousand Nine Hundred Ninety-Nine

The Indian Number System — Place Values

In the Indian number system, we group digits from right to left as: Ones, Tens, Hundreds, Thousands.

Place	Value	Example (in 3,572)
Ones	1	2 (2 × 1 = 2)
Tens	10	7 (7 × 10 = 70)
Hundreds	100	5 (5 × 100 = 500)
Thousands	1,000	3 (3 × 1,000 = 3,000)

Expanded form of 3,572:
3,572 = 3,000 + 500 + 70 + 2
= Three Thousand + Five Hundred + Seventy + Two
= Three Thousand Five Hundred Seventy-Two

The Indian system uses commas after the thousands place: 1,000 / 9,999. For numbers above 9,999 (which you will learn in Class 4), the next group is "ten thousand" and then "lakh".

Rules for Writing Number Names

Follow these important rules when writing numbers in words:

Rule	Example
Use a hyphen (-) for numbers 21 to 99 (except round tens)	twenty-one, thirty-five, ninety-nine
Do NOT use "and" in the Indian system	✓ Five Hundred Twelve ✗ Five Hundred and Twelve
Capitalise the first letter when starting a sentence	Three hundred students attended the event.
Do not use commas in number names	✓ Two Thousand Four Hundred ✗ Two Thousand, Four Hundred
Write "zero" only when the number is 0 itself	0 = Zero, but 105 = One Hundred Five (not "One Hundred Zero Five")
Round numbers are single words	twenty, thirty, hundred, thousand

Converting Words to Numbers

Sometimes we need to read a number name and write the numeral. Here is how:

Convert "Four Thousand Three Hundred Sixty-Two" to a number:
Step 1: Four Thousand = 4,000
Step 2: Three Hundred = 300
Step 3: Sixty-Two = 62
Step 4: Add them: 4,000 + 300 + 62 = 4,362

Convert "Six Thousand Nine" to a number:
Step 1: Six Thousand = 6,000
Step 2: Nine = 9
Step 3: Add: 6,000 + 9 = 6,009

Convert "Eight Hundred Forty" to a number:
Step 1: Eight Hundred = 800
Step 2: Forty = 40
Step 3: Add: 800 + 40 = 840

Number Names in Indian Daily Life

We use number names in many real-life situations in India:

Indian bank cheque with amount ₹2,450 written in words

1. Writing Cheques: When Meena's father writes a cheque for ₹2,450, he writes:

In figures: ₹2,450
In words: Two Thousand Four Hundred Fifty Only

2. Price Tags: At a shop, a school bag costs ₹1,275. The shopkeeper writes:

Price: ₹1,275 → One Thousand Two Hundred Seventy-Five Rupees

3. Population Numbers: Ravi's village has a population of 3,856 people.

3,856 → Three Thousand Eight Hundred Fifty-Six

4. Distance: The distance from Delhi to Jaipur is about 281 km.

281 → Two Hundred Eighty-One kilometres

5. School Strength: Sita's school has 1,450 students.

1,450 → One Thousand Four Hundred Fifty students

📝 Key Words

Word	Meaning
Number name	A number written in words (e.g., 45 = forty-five)
Numeral	A number written in digits (e.g., forty-five = 45)
Hyphen (-)	The small dash used between tens and ones (twenty-one)
Place value	The value of a digit based on its position (ones, tens, hundreds, thousands)
Expanded form	Breaking a number into place values (356 = 300 + 50 + 6)
Indian number system	The system using ones, tens, hundreds, thousands, ten thousands, lakhs
Hundred	The place value for the third digit from right (100–900)
Thousand	The place value for the fourth digit from right (1,000–9,000)

⭐ Key Points to Remember

Numbers 1–20 have unique names that must be memorised.
Tens names: twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety.
Use a hyphen for numbers 21–99: twenty-one, thirty-five, ninety-nine.
Hundreds pattern: [digit] Hundred [remaining number name].
Thousands pattern: [digit] Thousand [hundreds] [tens-ones].
In the Indian system, do NOT use "and" (write "Five Hundred Twelve", not "Five Hundred and Twelve").
Skip zeros — do not say "zero" for empty place values (105 = One Hundred Five).
Spelling traps: forty (not fourty), ninety (not ninty), eight (not eigth), twelve (not tweleve).
When writing cheques, always add "Only" at the end of the amount in words.
The largest 4-digit number is 9,999 = Nine Thousand Nine Hundred Ninety-Nine.

✏️ Practice Questions

A. Fill in the Blanks

1. The number name of 67 is .

2. The number for "eighty-four" is .

3. The number name of 100 is .

4. 356 in words is .

5. The number for "Seven Hundred Ninety-One" is .

6. 1,000 in words is .

7. The number name of 2,450 is .

8. The number for "Five Thousand Three Hundred" is .

9. 9,999 in words is .

10. The number for "Four Thousand Sixty-Two" is .

B. Choose the Correct Answer

1. What is the number name of 405?

(a) Four Hundred Five(b) Forty-Five(c) Four Hundred Fifty(d) Four Thousand Five

2. Which is the correct spelling?

(a) fourty(b) forty(c) fortey(d) faurty

3. What number is "Three Thousand Two Hundred Sixteen"?

(a) 3,216(b) 3,261(c) 32,016(d) 316

4. Which is the correct way to write 512 in words (Indian system)?

(a) Five Hundred and Twelve(b) Five Hundred Twelve(c) Five-Hundred-Twelve(d) Fivehundred Twelve

5. What is the number name of 8,070?

(a) Eight Hundred Seventy(b) Eight Thousand Seven(c) Eight Thousand Seventy(d) Eighty Thousand Seventy

C. Write the Number Names

1. Write the number name of 275.

2. Write the number name of 1,308.

3. Write the number name of 6,040.

4. Write the number name of 4,999.

5. A bicycle costs ₹3,750. Write this amount in words as you would on a cheque.

D. Write the Numerals

1. Six Hundred Thirty-Eight =

2. Two Thousand One Hundred Five =

3. Nine Thousand Forty =

4. Seven Thousand Seven Hundred Seven =

5. One Thousand Nine Hundred Ninety-Nine =

E. True or False

1. The number name of 90 is "ninty".

2. In the Indian system, we write "Five Hundred and Twelve" for 512.

3. 3,005 in words is "Three Thousand Five".

4. A hyphen is used for numbers 21 to 99.

5. The largest 4-digit number name is "Nine Thousand Nine Hundred Ninety-Nine".

🎨 Activity: Cheque Writing Practice

Imagine you are writing cheques for the following amounts. Write each amount in words as it would appear on a cheque (remember to add "Only" at the end):

₹1,500 → _______________________________________________
₹2,875 → _______________________________________________
₹4,010 → _______________________________________________
₹7,999 → _______________________________________________
₹650 → _______________________________________________

Bonus: Ask your parents to show you a real cheque book. Look at how amounts are written in words!

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🎯 Learning Objectives

Write number names for numbers 1 to 100.
Write number names for hundreds (100 to 999).
Write number names for thousands (1,000 to 9,999).
Understand the Indian number system (ones, tens, hundreds, thousands).
Apply rules for writing number names (hyphen for 21–99).
Convert numbers to words and words to numbers.
Use number names in real-life situations like cheque writing and price tags.

📖 Introduction

When Arjun's father writes a cheque for ₹2,450, he must write the amount in words: Two Thousand Four Hundred Fifty. In Class 3, we will learn to write number names for numbers up to 9,999. This skill is used in cheque writing, reading price tags, and understanding population figures.

Recap: Number Names 1 to 20

No.	Name	No.	Name	No.	Name	No.	Name
1	one	6	six	11	eleven	16	sixteen
2	two	7	seven	12	twelve	17	seventeen
3	three	8	eight	13	thirteen	18	eighteen
4	four	9	nine	14	fourteen	19	nineteen
5	five	10	ten	15	fifteen	20	twenty

Tens Names (Multiples of 10)

Number	Name	Number	Name
10	ten	60	sixty
20	twenty	70	seventy
30	thirty	80	eighty
40	forty	90	ninety
50	fifty	100	one hundred

Spelling alert! It is forty (NOT "fourty") and ninety (NOT "ninty").

Number Names 21 to 99

Rule: Tens name + hyphen (-) + ones name
21 = twenty-one 35 = thirty-five 48 = forty-eight 67 = sixty-seven 99 = ninety-nine
Worked Example (67): Tens = sixty, Ones = seven → sixty-seven

Number	Name	Number	Name
21	twenty-one	61	sixty-one
33	thirty-three	72	seventy-two
45	forty-five	85	eighty-five
57	fifty-seven	99	ninety-nine

Number Names for Hundreds (100–999)

Pattern: [Digit] Hundred [Remaining number name]
100 = One Hundred 200 = Two Hundred 500 = Five Hundred

Worked Example (356):
Hundreds = 3 → Three Hundred | Remaining = 56 → Fifty-Six
Answer: Three Hundred Fifty-Six

Worked Example (409):
Hundreds = 4 → Four Hundred | Tens = 0 (skip) | Ones = 9 → Nine
Answer: Four Hundred Nine

Number	Number Name
125	One Hundred Twenty-Five
347	Three Hundred Forty-Seven
502	Five Hundred Two
618	Six Hundred Eighteen
750	Seven Hundred Fifty
999	Nine Hundred Ninety-Nine

In the Indian system, do NOT use "and". Write "Five Hundred Twelve" (not "Five Hundred and Twelve").

Number Names for Thousands (1,000–9,999)

Pattern: [Digit] Thousand [Hundreds] [Tens-Ones]
1,000 = One Thousand 2,000 = Two Thousand 5,000 = Five Thousand

Worked Example (2,450):
Thousands = 2 → Two Thousand | Hundreds = 4 → Four Hundred | Remaining = 50 → Fifty
Answer: Two Thousand Four Hundred Fifty

Worked Example (7,036):
Thousands = 7 → Seven Thousand | Hundreds = 0 (skip) | Remaining = 36 → Thirty-Six
Answer: Seven Thousand Thirty-Six

Worked Example (5,008):
Thousands = 5 → Five Thousand | Hundreds = 0, Tens = 0 (skip) | Ones = 8 → Eight
Answer: Five Thousand Eight

Number	Number Name
1,234	One Thousand Two Hundred Thirty-Four
2,450	Two Thousand Four Hundred Fifty
3,007	Three Thousand Seven
4,500	Four Thousand Five Hundred
6,789	Six Thousand Seven Hundred Eighty-Nine
9,999	Nine Thousand Nine Hundred Ninety-Nine

Indian Number System — Place Values

Place	Value	Example (in 3,572)
Ones	1	2 (2 × 1 = 2)
Tens	10	7 (7 × 10 = 70)
Hundreds	100	5 (5 × 100 = 500)
Thousands	1,000	3 (3 × 1,000 = 3,000)

Expanded form of 3,572: 3,000 + 500 + 70 + 2 = Three Thousand Five Hundred Seventy-Two

Rules for Writing Number Names

Rule	Example
Use hyphen for 21–99	twenty-one, sixty-seven, ninety-nine
No "and" in Indian system	✓ Five Hundred Twelve ✗ Five Hundred and Twelve
Skip zeros	105 = One Hundred Five (not "One Hundred Zero Five")
No commas in words	✓ Two Thousand Four Hundred ✗ Two Thousand, Four Hundred

Converting Words to Numbers

"Four Thousand Three Hundred Sixty-Two" → 4,000 + 300 + 62 = 4,362
"Six Thousand Nine" → 6,000 + 9 = 6,009
"Eight Hundred Forty" → 800 + 40 = 840

Number Names in Indian Daily Life

Cheque writing: ₹2,450 → Two Thousand Four Hundred Fifty Only
Price tags: ₹1,275 → One Thousand Two Hundred Seventy-Five Rupees
Population: 3,856 people → Three Thousand Eight Hundred Fifty-Six
Distance: 281 km → Two Hundred Eighty-One kilometres
School strength: 1,450 students → One Thousand Four Hundred Fifty

📝 Key Words

Word	Meaning
Number name	A number written in words (45 = forty-five)
Numeral	A number written in digits (forty-five = 45)
Hyphen (-)	Dash used between tens and ones (twenty-one)
Place value	Value of a digit based on position
Expanded form	Breaking a number into place values
Hundred	Third digit from right (100–900)
Thousand	Fourth digit from right (1,000–9,000)

⭐ Key Points to Remember

Numbers 1–20 have unique names — memorise them.
Use a hyphen for numbers 21–99: twenty-one, ninety-nine.
Hundreds: [digit] Hundred [remaining]. Thousands: [digit] Thousand [hundreds] [tens-ones].
Indian system: No "and". Skip zeros. No commas in words.
Spelling traps: forty (not fourty), ninety (not ninty), eight (not eigth).
Cheques: Add "Only" at the end. Largest 4-digit: 9,999 = Nine Thousand Nine Hundred Ninety-Nine.

✏️ Practice Questions

A. Fill in the Blanks

1. The number name of 67 is .

2. The number for "eighty-four" is .

3. The number name of 100 is .

4. 356 in words is .

5. The number for "Seven Hundred Ninety-One" is .

6. 1,000 in words is .

7. The number name of 2,450 is .

8. The number for "Five Thousand Three Hundred" is .

9. 9,999 in words is .

10. The number for "Four Thousand Sixty-Two" is .

B. Choose the Correct Answer

1. What is the number name of 405?

(a) Four Hundred Five(b) Forty-Five(c) Four Hundred Fifty(d) Four Thousand Five

2. Which is the correct spelling?

(a) fourty(b) forty(c) fortey(d) faurty

3. What number is "Three Thousand Two Hundred Sixteen"?

(a) 3,216(b) 3,261(c) 32,016(d) 316

4. Which is correct in the Indian system for 512?

(a) Five Hundred and Twelve(b) Five Hundred Twelve(c) Five-Hundred-Twelve(d) Fivehundred Twelve

5. What is the number name of 8,070?

(a) Eight Hundred Seventy(b) Eight Thousand Seven(c) Eight Thousand Seventy(d) Eighty Thousand Seventy

C. Write the Number Names

1. Write the number name of 275.

2. Write the number name of 1,308.

3. Write the number name of 6,040.

4. Write the number name of 4,999.

5. A bicycle costs ₹3,750. Write this amount in words as on a cheque.

D. Write the Numerals

1. Six Hundred Thirty-Eight =

2. Two Thousand One Hundred Five =

3. Nine Thousand Forty =

4. Seven Thousand Seven Hundred Seven =

5. One Thousand Nine Hundred Ninety-Nine =

E. True or False

1. The number name of 90 is "ninty".

2. In the Indian system, we write "Five Hundred and Twelve" for 512.

3. 3,005 in words is "Three Thousand Five".

4. A hyphen is used for numbers 21 to 99.

5. The largest 4-digit number name is "Nine Thousand Nine Hundred Ninety-Nine".

🎨 Activity: Cheque Writing Practice

Write each amount in words as it would appear on a cheque (add "Only" at the end):

₹1,500 →

₹2,875 →

₹4,010 →

₹7,999 →

₹650 →

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Number Names

🎯 Learning Objectives

📖 Introduction

Recap: Number Names 1 to 20

Tens Names (Multiples of 10)

Number Names 21 to 99 (Two-Digit Numbers)

Number Names for Hundreds (100 to 999)

Number Names for Thousands (1,000 to 9,999)

The Indian Number System — Place Values

Rules for Writing Number Names

Converting Words to Numbers

Number Names in Indian Daily Life

📝 Key Words

✏️ Practice Questions

Number Names

Number Names (continued)

Number Names (practice)