A Story of Numbers
CBSE · Class 8 · Mathematics
All formulas from A Story of Numbers in CBSE Class 8 Mathematics. Key equations, constants, and identities for board exam preparation.
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Formulas
3. Roman Number System
27 = 10 + 10 + 5 + 1 + 1 → XXVII
4. Base Systems: Egyptian, Mesopotamian, Mayan, Chinese, Hindu
3426 = 1000 + 1000 + 1000 + 100 + 100 + 100 + 100 + 10 + 10 + 1 + 1 + 1 + 1 + 1 + 1
640 = (10) × 60 + 40
= (4) × 360 + (11) × 20 + (3) × 10 = 1660
2634 = (2) × 10^3 + (6) × 10^2 + (3) × 10 + (4) × 1
375 = (3) × 10^2 + (7) × 10 + (5) × 1
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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
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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