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Large Numbers Around Us — Study Plan

CBSE · Class 7 · Mathematics

A step-by-step study plan for Large Numbers Around Us, CBSE Class 7 Mathematics: what to learn first, what to practise and when to revise.

37 questions60 flashcards11 formulas & key relations5 concepts

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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: 1. Understanding One Lakh and Related Large Numbers, 2. Estimation, Rounding, and Approximation, 3. Seeing Large Numbers in Real Life.

2
Day 3

Practise

Solve the textbook exercises and extra practice questions. There are 37 questions available for this chapter.

3
Day 4

Revise & Test

Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.

4
Day 7

Spaced Revision

Come back to Large Numbers Around Us after a week. Use flashcards for quick recall and try past exam questions on this chapter.

What to Focus On

  • 1 lakh = 1 followed by 5 zeroes = 1,00,000
  • The Indian number system uses commas in groups from right to left: 3 digits, then 2 digits, then 2 digits
  • Large numbers can be compared with familiar quantities to understand their size
  • A number can seem big in one context and small in another
  • Most humans have 80,000 to about a lakh hairs on their heads
  • The Ahmedabad cricket stadium has a seating capacity of more than 1 lakh
  • 12,78,830 is read as twelve lakh seventy eight thousand eight hundred thirty
  • 15,75,000 is read as fifteen lakh seventy five thousand
  • 1 crore = 100 lakhs

Common Mistakes to Avoid

1 lakh and 1 million are the same in every way, including comma placement and number name.

A lakh is a thousand times a thousand, so it must be 1,000,000.

A crore is 1,00,000 because it sounds close to lakh.

Memory Tips

1 lakh

1 crore

1 million equals ten lakhs

1 arab equals 100 crore or 1 billion

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Frequently Asked Questions

What are the important topics in Large Numbers Around Us for CBSE Class 7 Mathematics?
Key topics in Large Numbers Around Us include Understanding One Lakh and Related Large Numbers, Estimation, Rounding, and Approximation, Seeing Large Numbers in Real Life, Rapid Counting and Calculator Patterns. Study these first, then practise questions on each for Class 7 exams.
How should I revise Large Numbers Around Us for Class 7 exams?
Learn the core ideas first, then work through the 37 practice questions on Large Numbers Around Us. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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