What is The Number 109?

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Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

The number 109 is a natural number that comes after 108 and before 110. It is a three-digit number, meaning it is made up of three places: hundreds, tens, and ones.

Simple Example

Quick Example

Imagine you are counting how many runs your favourite cricket team scored. If they scored 108 runs and then hit one more run, their total score would become 109 runs. It's just one more than 108!

Worked Example

Step-by-Step

Let's break down the number 109 into its place values.
1. Identify the digits: The digits in 109 are 1, 0, and 9.
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2. Find the ones place: The digit on the far right is 9. So, there are 9 ones.
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3. Find the tens place: The middle digit is 0. So, there are 0 tens.
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4. Find the hundreds place: The digit on the far left is 1. So, there is 1 hundred.
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5. Combine them: 1 hundred + 0 tens + 9 ones = 100 + 0 + 9 = 109.
Answer: The number 109 is composed of 1 hundred, 0 tens, and 9 ones.

Why It Matters

Understanding numbers like 109 is fundamental for all math operations, from simple counting to complex calculations. This basic knowledge is crucial for careers like accounting, engineering, and even managing a small shop, where you constantly deal with quantities and money.

Common Mistakes

MISTAKE: Reading 109 as 'one nine' or 'one hundred nine zero' | CORRECTION: Read 109 as 'one hundred nine'. The zero in the tens place means 'no tens', not that you skip it entirely.

MISTAKE: Confusing the place value of 0, thinking it has no value. | CORRECTION: The 0 in 109 is a placeholder. It shows there are no tens, but it's essential to keep the 1 in the hundreds place and the 9 in the ones place correctly positioned.

MISTAKE: Writing 109 as 19 or 1009 by mistake. | CORRECTION: Remember 109 has exactly three digits. The '0' is crucial to separate the '1' (hundreds) from the '9' (ones).

Practice Questions

Try It Yourself

QUESTION: What number comes just after 109? | ANSWER: 110

QUESTION: If you have 100 laddoos and someone gives you 9 more, how many laddoos do you have in total? | ANSWER: 109 laddoos

QUESTION: Write the number 109 in words. | ANSWER: One hundred nine

MCQ

Quick Quiz

Which of these represents the number 109?

1 hundred, 9 tens, 0 ones

1 hundred, 0 tens, 9 ones

10 tens, 9 ones

1 hundred, 9 ones, 1 ten

The Correct Answer Is:

Option B correctly breaks down 109 into its place values: 1 in the hundreds place, 0 in the tens place, and 9 in the ones place. The other options misrepresent the tens or ones value.

Real World Connection

In the Real World

The number 109 can appear in many places in India. For example, a mobile phone's battery percentage could be 100%, and if you imagine a game, you might score 109 points. Or, if you're checking train seat availability, you might see 109 seats available on a popular route.

Key Vocabulary

Key Terms

NATURAL NUMBER: A counting number like 1, 2, 3... | PLACE VALUE: The value of a digit based on its position in a number | DIGIT: A single symbol used to make numbers (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) | HUNDREDS PLACE: The third digit from the right in a number, representing groups of one hundred

What's Next

What to Learn Next

Now that you understand 109, you can explore other three-digit numbers and learn how to compare them. You can also start practicing addition and subtraction with numbers up to 1000, building on this foundational knowledge.