What is Writing Decimals in Words?

S1-SA2-0362

Grade Level:

Class 3

All STEM domains, Finance, Economics, Data Science, AI, Physics, Chemistry

Definition

What is it?

Writing decimals in words means changing a number like 3.5 into its word form, which is 'three and five tenths'. We read the whole number part, then say 'and' for the decimal point, and then read the decimal part followed by its place value.

Simple Example

Quick Example

Imagine you buy a packet of biscuits for Rs 12.75. In words, you would say this as 'twelve rupees and seventy-five paise'. Here, 12 is the whole number, and 75 is the decimal part, meaning 75 hundredths of a rupee.

Worked Example

Step-by-Step

Let's write 24.38 in words.

Step 1: Identify the whole number part. It is 24.
---Step 2: Write the whole number part in words. 'Twenty-four'.
---Step 3: Identify the decimal point. We say 'and' for the decimal point.
---Step 4: Identify the decimal part. It is 38.
---Step 5: Count the number of digits after the decimal point. There are two digits (3 and 8).
---Step 6: The place value for two decimal places is 'hundredths'.
---Step 7: Combine everything: 'Twenty-four and thirty-eight hundredths'.
---Answer: Twenty-four and thirty-eight hundredths.

Why It Matters

Understanding decimals in words is super important in daily life, like when you read prices or measurements. In careers like banking, finance, or even engineering, accurately reading and writing decimal numbers prevents big mistakes and ensures clear communication.

Common Mistakes

MISTAKE: Saying 'point' instead of 'and' for the decimal point in formal contexts (e.g., 'three point five'). | CORRECTION: Always use 'and' to represent the decimal point when writing or speaking decimals in words (e.g., 'three and five tenths').

MISTAKE: Not stating the place value of the last digit (e.g., 'four and three' for 4.3). | CORRECTION: Always mention the place value of the last digit in the decimal part (e.g., 'four and three tenths').

MISTAKE: Reading each digit in the decimal part separately (e.g., 'five and two three' for 5.23). | CORRECTION: Read the decimal digits together as a number, then state their combined place value (e.g., 'five and twenty-three hundredths').

Practice Questions

Try It Yourself

QUESTION: Write 7.1 in words. | ANSWER: Seven and one tenth

QUESTION: Write 15.62 in words. | ANSWER: Fifteen and sixty-two hundredths

QUESTION: The cricket team scored 185.4 runs. Write this number in words. | ANSWER: One hundred eighty-five and four tenths

MCQ

Quick Quiz

Which of these correctly writes 9.05 in words?

Nine point zero five

Nine and five tenths

Nine and five hundredths

Nine and zero five

The Correct Answer Is:

The decimal part is 05, which is 'five'. Since there are two decimal places, the place value is hundredths. So, it's 'Nine and five hundredths'.

Real World Connection

In the Real World

When you see the fuel price at a petrol pump, like Rs 98.50 per litre, you're reading a decimal. The bill you get from a grocery store or a UPI payment confirmation also shows amounts like Rs 149.99. Understanding how to read these numbers in words helps you confirm the correct amount and avoid confusion.

Key Vocabulary

Key Terms

DECIMAL POINT: A dot separating the whole number part from the fractional part of a number | PLACE VALUE: The value of a digit based on its position in a number (e.g., tenths, hundredths) | TENTHS: The first place value after the decimal point | HUNDREDTHS: The second place value after the decimal point

What's Next

What to Learn Next

Great job learning about writing decimals in words! Next, you can explore 'Comparing Decimals'. This will help you understand which decimal number is bigger or smaller, which is useful when comparing prices or measurements.