Problem Set 4 – Seven-Digit Numbers and Ten LakhClass 5 Maths · Chapter 2 Number Work · Problem Set 4 – Maharashtra Board

Summary: Problem Set 4 – Seven-Digit Numbers and Ten Lakh

Ten times one lakh is ten lakh: 1,00,000 × 10 = 10,00,000. It has seven digits, so we make a new place, the ten lakhs place.

In many western countries ten lakh is called one million.

Seven-digit numbers have the places ten lakhs, lakhs, ten thousands, thousands, hundreds, tens and units. Commas go like this: 46,08,250.

Just as we read ten thousands and thousands together, we read ten lakhs and lakhs together: 46,08,250 → forty-six lakh, eight thousand, two hundred and fifty.

The smallest seven-digit number is 10,00,000 and the biggest is 99,99,999.

Key points to remember

• 1,00,000 × 10 = 10,00,000 (ten lakh)
• Ten lakh = one million
• Ten lakhs place is left of the lakhs place
• Read ten lakhs and lakhs together (46 lakh)
• Commas: 2 | 2 | 3 digits from the left: 46,08,250
• Smallest seven-digit number = 10,00,000
• Biggest seven-digit number = 99,99,999
• Skip a part that is all zeros when reading

Problem Set 4 – Seven-Digit Numbers and Ten Lakh – Notes

1. From lakh to ten lakh

• If 10 people each get ₹1,00,000, the total is 10 times one lakh.
• Multiplying by 10 puts one zero at the end: 1,00,000 × 10 = 10,00,000.
• This number has seven digits. We read it as ten lakh.

2. Million

• In western countries, people count in thousands and millions.
• One million = ten lakh = 10,00,000.
• So two million = 20,00,000 (twenty lakh).

3. Places in a seven-digit number

• From the left: ten lakhs, lakhs | ten thousands, thousands | hundreds, tens, units.
• The first comma comes after the lakhs part and the second after the thousands part: 52,30,407.
• Each place is worth ten times the place on its right.

4. Reading seven-digit numbers

• Read the first two digits together as 'lakh', the next two as 'thousand', then the last three.
• If the thousands part is 00, do not say 'thousand': 80,00,060 → eighty lakh and sixty.
• Long readings are easier if you cover the parts with your finger one by one.

5. Writing seven-digit numbers in figures

• Write the lakhs part with two digits, the thousands part with two digits, and the last part with three digits.
• Fill every empty place with 0: thirty-four lakh, five thousand and eleven → 34,05,011.
• Count: a seven-digit number must have exactly seven digits.

Formulas at a glance

Key terms

Problem Set 4 – Seven-Digit Numbers and Ten Lakh – Flashcards

Read the question, answer it in your head, then tap the card to check. 10 cards.

Problem Set 4 – Seven-Digit Numbers and Ten Lakh – MCQ Quiz

10 questions. Tap an option — you will see at once if it is right and why.

How to study Problem Set 4 – Seven-Digit Numbers and Ten Lakh

⏱ About 25 minutes

1. Understand (5 min)
   Multiply 1,00,000 by 10 and see the new ten lakhs place.
2. Read and write (15 min)
   Read six seven-digit numbers aloud and write four number names in figures.
3. Practise (5 min)
   Do the 4 'Try it yourself' sums, take the quiz and play 🎮 Play.