What is One Lakh?

S1-SA1-0006

Grade Level:

Class 4

Maths, Finance, India-specific, Data Science

Definition

What is it?

One Lakh is a way to say 'one hundred thousand' in the Indian numbering system. It is written as 1,00,000, where the comma separates the thousands place from the lakhs place. This number is very common when talking about money, population, or large quantities in India.

Simple Example

Quick Example

Imagine your favourite cricket team scores 100 runs in a match. If they score this many runs 1000 times, that would be 1,00,000 runs in total! So, 1000 hundreds make one lakh.

Worked Example

Step-by-Step

PROBLEM: How many 10-rupee notes make one lakh rupees?

STEP 1: Understand what one lakh means. One lakh is 1,00,000.
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STEP 2: We want to find out how many 10-rupee notes are needed to make 1,00,000 rupees.
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STEP 3: To do this, we need to divide the total amount (1,00,000) by the value of each note (10).
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STEP 4: Calculation: 1,00,000 ÷ 10 = 10,000.
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STEP 5: So, 10,000 ten-rupee notes make one lakh rupees.

ANSWER: 10,000 ten-rupee notes.

Why It Matters

Understanding 'lakh' is crucial for daily life in India, especially when dealing with money or large numbers. In finance, you'll hear about salaries in lakhs, and in data science, population figures or sales numbers are often expressed this way. It's a fundamental concept for anyone working with numbers in India.

Common Mistakes

MISTAKE: Writing one lakh as 100,000 (with commas after every three digits) | CORRECTION: In the Indian system, one lakh is written as 1,00,000 (with a comma after the thousands place and then after the lakhs place).

MISTAKE: Confusing one lakh with one million | CORRECTION: One lakh is 100,000. One million is 10 lakhs (or 1,000,000). They are different numbers!

MISTAKE: Not understanding the place value of the digits in 1,00,000 | CORRECTION: Remember, from right to left, the places are Ones, Tens, Hundreds, Thousands, Ten Thousands, and then Lakhs. The '1' in 1,00,000 is in the Lakhs place.

Practice Questions

Try It Yourself

QUESTION: How many hundreds are there in one lakh? | ANSWER: 1000 hundreds

QUESTION: If a new phone costs ₹15,000, how many phones can you buy with ₹1,50,000? | ANSWER: 10 phones

QUESTION: Your school has 250 students. If 400 such schools joined for a competition, how many total students would there be, expressed in lakhs? | ANSWER: 1 lakh student (1,00,000 students)

MCQ

Quick Quiz

Which of these numbers correctly represents one lakh?

100,000

1,00,000

10,000

1,000,000

The Correct Answer Is:

Option B, 1,00,000, is the correct way to write one lakh using the Indian numbering system. Option A is the international way, and options C and D are different numbers.

Real World Connection

In the Real World

When you see news reports about government budgets, a politician's salary, or the cost of a new car in India, the amounts are often stated in lakhs. For example, a mid-range car might cost '₹8 lakhs', which means ₹8,00,000. Even property prices in cities are discussed in lakhs and crores.

Key Vocabulary

Key Terms

LAKH: One hundred thousand (1,00,000) in the Indian numbering system | INDIAN NUMBERING SYSTEM: A system of writing numbers where commas are placed after the thousands and then every two digits (e.g., 1,00,000) | PLACE VALUE: The value of each digit in a number based on its position | CRORE: One hundred lakhs (1,00,00,000)

What's Next

What to Learn Next

Now that you understand one lakh, try learning about 'One Crore'. It's the next big number in the Indian system and builds directly on your understanding of lakhs. Keep practicing with large numbers!