Number Names 31 to 40
2026-02-28 13:11 Diff
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Last updated on August 5, 2025

Number names are a way of expressing the written form of numbers using letters. Learning number names will help you learn the basics of counting, addressing parcels, official documents, and so on. In this topic, we will learn number names from 31 to 40.

Number Names 31 to 40

These are the words that we use to represent numbers, which makes them easier to read.
Take the number 35, it is written as ‘Thirty-Five’.

Writing numbers in words not only helps us write legal documents and fill forms, but it also improves a student's spelling skills.

There are two different ways of naming numbers:

  • Indian Numbering System

  • International Numbering System

Understanding how numbers are named using both systems will help in communication as well as in arithmetic calculations.

Now let’s discuss the two numbering systems.

Indian Numbering System

In the Indian Numbering System, digits are assigned place values starting from the right. These place values include:

Ones → Tens → Hundreds → Thousands → Ten Thousands → Lakhs → Ten Lakhs → Crores

Each digit in a number has a value based on its position.

For example, in the number 36:

  • 6 is in the ones place

  • 3 is in the tens place

Let’s take a larger number: 9,56,28,743
It is written as:
Nine Crore Fifty-Six Lakhs Twenty-Eight Thousand Seven Hundred Forty-Three

The number gets placed as:

  • 9 in the crores place

  • 5 in the ten lakhs place

  • 6 in the lakhs place

  • 2 in the ten thousands place

  • 8 in the thousands place

  • 7 in the hundreds place

  • 4 in the tens place

  • 3 in the ones place

International Numbering System

Just like the Indian Numbering System, the International Numbering System also uses place names, but they differ for larger numbers.

The place value starts from the right and follows this order:
Ones → Tens → Hundreds → Thousands → Ten Thousands → Hundred Thousands → Millions → Ten Millions → Hundred Millions, and so on.

Let’s take the example of 74,385,629
It is written as:
Seventy-Four Million Three Hundred Eighty-Five Thousand Six Hundred Twenty-Nine

The number gets placed as:

  • 7 in the Ten Million place

  • 4 in the Million place

  • 3 in the Hundred Thousands place

  • 8 in the Ten Thousands place

  • 5 in the Thousands place

  • 6 in the Hundreds place

  • 2 in the Tens place

  • 9 in the Ones place

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Number Names 31 to 40 Chart

Learning the names of the numbers from 31 to 40 using a chart will make it easy for students to write the numbers in words. List of Numbers in Words 31 to 40

The list given below shows how numbers from 31 to 40 are written using letters. Learning to write the numbers in words improves their skills in reading and writing.

Rules for Writing Numbers from 31 to 40

While writing numbers from 31 to 40, there are certain rules to be followed. Below discussed are some rules to keep in mind while writing the names of numbers.

Rule 1: Always start naming with ‘Thirty’ for any number from 30 to 39. For example, 35 is written as Thirty-Five.

Rule 2: For numbers starting with 40, use “Forty.” For example, 41 is written as “Forty-One.”

Rule 3: Numbers after 30 follow a pattern. For example, 34 is written as Thirty-Four, 37 is written as Thirty-Seven, and 39 is written as Thirty-Nine.

Tips and Tricks for Number Names 31 to 40

Always use a hyphen while writing numbers like 35, and 38. It should be written as Thirty-Five and Thirty-Eight. Always keep writing the numbers starting from ‘Thirty’, as in Thirty-One for 31 and Forty for 40.

Always focus on the ones place for numbers like 31, 32, 33, etc.

After writing Thirty, you just need to add the number, that's it.

The mentioned numbers can be written as Thirty-One, Thirty-Two, and Thirty-Three.

Common Mistakes and How to Avoid Them in Number Names 31 to 40

Students can make mistakes while learning number names. Let’s discuss a few mistakes a student can make while writing numbers from 31 to 40.

Problem 1

What is the sum of 15 + 20 in words?

Okay, lets begin

Thirty-Five

Explanation

First, we need to find the sum 15 + 20.

The sum is 35 → 15 + 20 = 35.

We write 35 in words as Thirty-Five.

Well explained 👍

Problem 2

What is the difference of 40 - 8 in words?

Okay, lets begin

Thirty-Two

Explanation

We need to find the difference between 40 and 8.

The difference is 32 → 40 - 8 = 32.

Therefore, we write the answer as Thirty-Two.

Well explained 👍

Problem 3

Find the product of 8 and 4. Write the result in words.

Okay, lets begin

Thirty-Two

Explanation

The product is 32 → 8 × 4 = 32.

Hence, 32 in words is Thirty-Two.

Well explained 👍

Problem 4

What is (40 ÷ 2) + 10 in words?

Okay, lets begin

Thirty

Explanation

((40 ÷ 2) + 10) = 20 + 10 = 30.

We find the final result as 30.

Therefore, 30 is written as Thirty.

Well explained 👍

Problem 5

What is the product of 7 and 5 in words?

Okay, lets begin

Thirty-Five

Explanation

The product of 7 and 5 is 35. → 7 × 5 = 35.

So, 35 in words is Thirty-Five.

Well explained 👍

FAQs on Number Names 31 to 40

1.What is the number name of 36?

The number name of the number 36 is Thirty-Six.

2.What is (40 - 3) in words?

The difference is 37. Therefore, 37 in words is Thirty-Seven.

3.Which is correct for 38: Thirty-Eight or Therty-Eight?

The correct number name for number 38 is Thirty-Eight.

4.How to write 789 using the Indian Numbering System?

789 in the Indian Numbering System is written as Seven Hundred Eighty-Nine.

5.What is the number form of 10 million?

The number form of 10 million is 10,000,000. Here, 10 is followed by six zeroes.

Important Glossaries for Number Names 31 to 40

  • Place Value: The value of a digit based on its position in a number.
    Example: In 34, 4 is in the ones place, and 3 is in the tens place.

  • Number Form: The numeric form of a number written in words.
    Example: Thirty-Three → 33

  • Hyphen: A punctuation mark used to connect parts of a compound number.
    Example: Thirty-Four

  • Tens Place: The second digit from the right in a two-digit number, representing multiples of ten.

  • Ones Place: The rightmost digit in a number, representing units.

What Are Numbers? 🔢 | Fun Explanation with 🎯 Real-Life Examples for Kids | ✨BrightCHAMPS Math

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Hiralee Lalitkumar Makwana

About the Author

Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.

Fun Fact

: She loves to read number jokes and games.