Class 7 Maths - BIHAR
Large Numbers Around Us
In the Class 7 Mathematics chapter 'Large Numbers Around Us', Bihar Board students learn to read, write, and compare numbers that go far beyond thousands and lakhs into crores and arab. This chapter connects classroom mathematics to real-world scenarios such as country populations, national budgets, and astronomical distances. It builds essential foundational skills in the Indian Number System and the International Number System, teaching students how to use place value charts effectively. Mastering this chapter is crucial for scoring well in Bihar Board examinations, as it frequently features in both objective questions and word problems.
Start Learning FreeKey Concepts
Indian Number System
A numeration system grouping digits by ones, tens, hundreds, thousands, lakhs, and crores using commas after every two digits (except the first three).
International Number System
A worldwide numeration system grouping digits in periods of three—ones, thousands, millions, and billions—using commas after every three digits.
Place Value and Face Value
Face value is the digit itself, while place value is the product of the digit and its position value in the given number.
Estimation and Rounding Off
Approximating large numbers to the nearest tens, hundreds, thousands, or lakhs to make calculations simpler and more practical.
Comparison of Large Numbers
Determining which number is greater or smaller by first comparing the number of digits and then comparing digits from left to right.
Important Formulas
Board Exam Info
In the Bihar Board Class 7 Mathematics annual exams, this chapter typically carries around 6 to 8 marks. Common question types include converting numbers between Indian and International systems, writing large numbers in word form, expanding numbers based on place value, and solving word problems based on estimation.
Frequently Asked Questions
How do we place commas correctly in the Indian Number System?
In the Indian system, the first comma is placed after three digits from the right (hundreds place), and thereafter, commas are placed after every two digits.
What is the difference between 1 Million and 1 Lakh?
1 Lakh is equal to 100,000, whereas 1 Million is equal to 1,000,000. Therefore, 1 Million is equal to 10 Lakhs.
How do we compare two large numbers with the same number of digits?
Start comparing the digits from the leftmost side (highest place value). The number with the greater digit at the first differing position is the larger number.
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