CBSE Class 7 > Class 7 Notes > Mathematics (Ganita Prakash) - New NCERT Part 1 & 2 > NCERT Textbook: Large Numbers Around Us
NCERT Textbook: Large Numbers Around Us
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FAQs on NCERT Textbook: Large Numbers Around Us
| 1. How do we read and write numbers in crores and lakhs for CBSE Class 7? |  |
Ans. The Indian numeral system groups digits into lakhs (5 digits from right), then crores (7 digits from right). For example, 1,23,45,678 reads as "one crore, twenty-three lakhs, forty-five thousand, six hundred and seventy-eight." Each period in the place value system represents a specific magnitude: ones, tens, hundreds, thousands, lakhs, and crores. Understanding this grouping helps students compare and order large numbers accurately.
| 2. What's the difference between the Indian place value system and the international numbering system? | |
Ans. The Indian system uses crores and lakhs (grouping by 2-2-3 digits), while the international system uses millions and billions (grouping by 3-3-3 digits). For instance, 10 million equals 1 crore in the Indian system. Class 7 students studying large numbers around us must recognise both formats because international data often uses billions, whereas Indian contexts use crores. This dual understanding is essential for interpreting real-world statistics.
| 3. Why do we need to understand large numbers when studying around us in real life? | |
Ans. Large numbers appear everywhere: India's population (over 140 crores), country's budget (in crores and lakhs), space distances, and economic data. Grasping these magnitudes helps students comprehend real-world scales and make sense of news, statistics, and everyday information. When studying large numbers around us, learners develop quantitative literacy-the ability to understand and compare vast quantities they encounter in textbooks, media, and society.
| 4. How do we convert large numbers between Indian and international systems for exams? | |
Ans. To convert, identify the number of digits and regroup: 1 crore = 10 million; 1 lakh = 100 thousand. For example, 5,00,00,000 (Indian) = 50,000,000 (international). Students preparing for Class 7 assessments should practise writing numbers in both formats and recognising their equivalents. Visual aids like flashcards and mind maps help reinforce these conversions quickly during revision.
| 5. What are the common mistakes students make when writing large numbers in expanded form? | |
Ans. Students often misalign place values or skip zeros, writing 1,05,000 as 1+5+0 instead of (1×10,00,000)+(5×1,000). Another error: forgetting that each digit represents its position's magnitude. The expanded form of large numbers requires multiplying each digit by its place value-ones, tens, hundreds, thousands, lakhs, and crores-then adding them. Practising with worksheets and visual references prevents these place value errors during exams.
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Document Description: NCERT Textbook: Large Numbers Around Us for Class 7 2026 is part of Mathematics (Ganita Prakash) Class 7 - New NCERT Part 1 & 2 preparation. The notes and questions for NCERT Textbook: Large Numbers Around Us have been prepared according to the Class 7 exam syllabus. Information about NCERT Textbook: Large Numbers Around Us covers topics like and NCERT Textbook: Large Numbers Around Us Example, for Class 7 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for NCERT Textbook: Large Numbers Around Us.
Introduction of NCERT Textbook: Large Numbers Around Us in English is available as part of our Mathematics (Ganita Prakash) Class 7 - New NCERT Part 1 & 2 for Class 7 & NCERT Textbook: Large Numbers Around Us in Hindi for Mathematics (Ganita Prakash) Class 7 - New NCERT Part 1 & 2 course. Download more important topics related with notes, lectures and mock test series for Class 7 Exam by signing up for free. Class 7: NCERT Textbook: Large Numbers Around Us
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NCERT Textbook: Large Numbers Around Us of Mathematics is the updated edition as per the latest syllabus of the 2026-27, PDF available for download.
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