Large Numbers Around Us
CBSE · Class 7 · Mathematics
Flashcards for Large Numbers Around Us — CBSE Class 7 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.
What is one lakh and how is it written in numbers?
Answer
One lakh = 1,00,000 (1 followed by 5 zeros). It represents 100 thousand or 10 × 10 × 10 × 10 × 10.
What is one crore and how is it written in numbers?
Answer
One crore = 1,00,00,000 (1 followed by 7 zeros). It represents 100 lakhs or 10 million.
How many lakhs make one crore?
Answer
100 lakhs = 1 crore. This is because 1 crore = 1,00,00,000 and 1 lakh = 1,00,000, so 1,00,00,000 ÷ 1,00,000 = 100.
Write 'twelve lakh seventy eight thousand eight hundred thirty' in numbers using Indian place value system.
Answer
12,78,830. Break it down: 12 lakhs (12,00,000) + 78 thousands (78,000) + 8 hundreds (800) + 30 = 12,78,830.
How is the comma placement different in Indian and American number systems?
Answer
Indian system: 3-2-2-2 pattern (1,00,000 = 1 lakh). American system: 3-3-3-3 pattern (100,000 = hundred thousand). Indian system uses lakhs and crores, American uses millions and billions.
What is 1 million in the Indian numbering system?
Answer
1 million = 10,00,000 = 10 lakhs in the Indian system. It has 6 zeros and equals 1,000,000 in American notation.
What is 1 billion in the Indian numbering system?
Answer
1 billion = 1,00,00,00,000 = 100 crores = 1 arab in the Indian system. It has 9 zeros.
If you press the +1000 button on a calculator 100 times, what number will you get?
Answer
100 × 1000 = 1,00,000 = 1 lakh. Each press adds 1000, so 100 presses give 100 thousands, which equals 1 lakh.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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