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Last updated on June 28th, 2025

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Number Names 20 to 40

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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 numbers names from 20 to 40.

Number Names 20 to 40 for Australian Students
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Number Names 20 to 40

These are the words that we use to represent numbers, which makes it easier to read. Take the number 25, it is written as ‘Twenty-Five’. Writing numbers in words not only helps us write legal documents, fill forms, but it will also help a student's spelling skill as well. There are two different ways of naming numbers. They are the Indian Numbering System and the International Numbering System. You need to understand how numbers are named using both the numbering systems. This will help you in communication as well as in arithmetic calculations. Now let’s discuss the two numbering systems.

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Indian Numbering System

In the Indian Numbering System, digits are assigned place values starting from the right. These place values include ones, tens, hundreds, and thousands, and continue to grow as the number increases. For example, in the number 28, the digit 8 is in the ones place, and 2 is in the tens place. Starting from the right, the order goes from ones to tens, hundreds, thousands, ten thousands, lakhs, ten lakhs, and crores. Each digit will have its value based on its position in the number. Let’s take an example of the number 56,743 The number gets written as Fifty-Six Thousand Seven Hundred Forty-Three. The number gets placed as: 5 in the ten thousands place 6 in the thousands place 7 in the hundreds place 4 in the tens place 3 in the ones place

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International Numbering System

Just like the Indian Numbering System, the International Numbering system also uses names, and they differ for bigger numbers. The place value starts from the right. The place values are ones, tens, hundreds, thousands, hundred thousands, millions, ten millions, hundred millions, and so on. Let’s take the example of 743,269, The number is written as Seven Hundred Forty-Three Thousand Two Hundred Sixty-Nine. The number gets placed as: 7 in the Hundred Thousands place 4 in the Ten Thousands place 3 in the Thousands place 2 in the Hundreds place 6 in the Tens place 9 in the Ones place

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Number Names 20 to 40 Chart

Learning the names of the numbers from 20 to 40 using a chart will make it easy for the students to write the numbers in words. List of Numbers in Words 20 to 40 The list given below shows how numbers from 20 to 40 are written using letters. Learning to write the numbers in words improves their skills in reading and writing.

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Rules for Writing Numbers from 20 to 40

While writing numbers from 20 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: Numbers from 21 to 29 are written starting with 'Twenty'. For example, 25 is written as Twenty-Five. Rule 2: Numbers from 30 to 39 are written starting with 'Thirty'. For example, 33 is written as Thirty-Three. Rule 3: Numbers follow a pattern in naming. For example, 24 is written as Twenty-Four, 35 is written as Thirty-Five, and 39 is written as Thirty-Nine.

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Tips and Tricks for Number Names 20 to 40

Always use a hyphen while writing numbers like 25 and 38. It should be written as Twenty-Five and Thirty-Eight. When writing numbers in the twenties and thirties, keep the prefix 'Twenty' or 'Thirty'. For example, 20 is 'Twenty' and 30 is 'Thirty'. Focus on the ones place for numbers like 21, 22, 23, etc. After writing Twenty, you just need to add the number. The mentioned numbers can be written as Twenty-One, Twenty-Two, and Twenty-Three.

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Common Mistakes and How to Avoid Them in Number Names 20 to 40

Students can make mistakes while learning number names. Let’s discuss a few mistakes a student can make while writing numbers from 20 to 40.

Mistake 1

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Ignoring the Hyphen

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Ignoring hyphens while writing numbers like 27 and 36 will consider the number as separate numbers. For example, 27 should be written as Twenty-Seven and not Twenty Seven.

Mistake 2

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Writing Thirty Zero instead of Thirty

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Students might get confused between Thirty Zero and Thirty for 30. The correct way to express 30 in words is Thirty. There’s no need to write zero after thirty.

Mistake 3

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Using ‘and’ while writing number names in American English

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We use ‘and’ while writing number names only in British English. For example, 32 is written as Thirty and Two. But in American English, we do not use ‘and’. The number 32 in American English is written as Thirty-Two. Always make sure that students are aware of the difference.

Mistake 4

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Incorrect spelling

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While writing the number names, be sure that you have written it correctly. For example, a child can write Thirty-Five and Therty-Five.

Mistake 5

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Getting confused with the tens and ones place

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Students can get confused between numbers like 24 and 42. In 24, we have 4 in the ones place and 2 in the tens place. In 42, we have 2 in the ones place and 4 in the tens place. To avoid these, students need to learn how to pronounce the numbers correctly. Once they learn to pronounce the numbers, they can write the number names correctly.

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Number Names 20 to 40 Examples

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Problem 1

What is the sum of 18 + 20 in words?

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Thirty-Eight

Explanation

First, we need to find the sum 18 + 20 The sum is 38 → 18 + 20 = 38 We write 38 in words as Thirty-Eight

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Problem 2

What is the difference of 40 - 10 in words?

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Thirty

Explanation

We need to find the difference between 40 and 10 The difference is 30 → 40 - 10 = 30 Therefore, we write the answer as Thirty

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Problem 3

Find the product of 4 and 5. Write the result in words

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Twenty

Explanation

The product is 20 → 4 × 5 = 20 Hence, 20 in words is Twenty.

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Max, the Girl Character from BrightChamps

Problem 4

What is (40 ÷ 2) + 10 in words

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Thirty

Explanation

((40 ÷ 2) + 10) = 20 + 10 = 30 We find the final result as 30. Therefore, 30 is written as Thirty

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Problem 5

What is the product of 2 and 19 in words?

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Thirty-Eight

Explanation

The product of 2 and 19 is 38 → 2 × 19 = 38 So, 38 in words is Thirty-Eight.

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FAQs on Number Names 20 to 40

1.What is the number name of 29?

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2.What is (40 - 8) in words?

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3.Which is correct for 35, Thirty-Five or Thirty-Four?

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4.How to write 7891 using the Indian Numbering System?

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5.What is the number form of 1 billion?

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6.How can children in Australia use numbers in everyday life to understand Number Names 20 to 40?

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7.What are some fun ways kids in Australia can practice Number Names 20 to 40 with numbers?

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8.What role do numbers and Number Names 20 to 40 play in helping children in Australia develop problem-solving skills?

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9.How can families in Australia create number-rich environments to improve Number Names 20 to 40 skills?

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Important Glossaries for Number Names 20 to 40

Place Value: The value of a digit based on its position within a given number. For example, in 34, we place 4 in the ones place and 3 in the tens place. Number Form: It is the numerical form of a number written in words. For example, the number form of Thirty-Four is 34. Hyphen: A punctuation mark used to join words and to separate syllables of a single word, such as in Twenty-Five. Tens Place: The second digit to the left of the decimal point in a number, indicating how many tens are in the number. For example, in 23, the 2 is in the tens place. Ones Place: The first digit to the left of the decimal point in a number, indicating how many ones are in the number. For example, in 23, the 3 is in the ones place.

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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.

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Fun Fact

: She loves to read number jokes and games.

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