Class 7 Maths Part 1 Chapter 1, Large Numbers Around Us, opens NCERT’s Grade 7 Ganita Prakash textbook by building number sense for lakhs, crores, millions and billions, comparing the Indian and International place-value systems, rounding and estimating, and discovering shortcuts in large-number products.
What Class 7 Mathematics Chapter 1 Covers
1.1–1.3 A Lakh Varieties, Land of Tens & Of Crores and Crores! builds intuition for 1 lakh ($10^5$), 10 lakh, 1 crore ($10^7$) and 100 crore (1 arab / 1 billion), and compares comma placement in the Indian system (3-2-2 grouping) and International system (3-3-3 grouping of millions and billions).
1.4 Exact and Approximate Values explains when to round up, round down or estimate to the nearest thousand, lakh or crore using city population tables and real-life travel distances.
1.5–1.6 Patterns in Products & Did You Ever Wonder…? explores multiplication shortcuts (multiplying by 5, 25, 125 and powers of 10), predicting the number of digits in a product, Fermi estimation problems, and toothpick digit puzzles.
Exercises in Chapter 1
- Figure it Out exercise sets and Summary with solved walkthroughs.
Read Class 7 Mathematics Chapter 1 Online
More Chapters
- Next: Chapter 2: Arithmetic Expressions
- Hindi medium: Class 7 Maths Part 1 Chapter 1 PDF in Hindi (Ganita Prakash)
- All Mathematics chapters and the other Class 7 books: Class 7 NCERT books 2026-27
FAQ
How are commas placed in the Indian vs International system of numeration?
In the Indian system, the first comma comes after three digits from the right (hundreds) and then after every two digits (thousands, lakhs, crores: e.g., 1,00,00,000 for 1 crore). In the International system, commas are placed after every three digits from the right (thousands, millions, billions: e.g., 10,000,000 for 10 million = 1 crore).
How many lakhs make 1 crore and how many millions make 1 crore?
100 lakhs make 1 crore ($1,00,00,000$), and 10 million equals 1 crore ($10,000,000$).