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Example 2 - Chapter 2 Class 7 - Operations with Integers (Ganita Prakash II)
Last updated at January 21, 2026 by Teachoo
Brahmagupta’s Rules for Multiplication and Division of Integers
Class 7 (Ganita Prakash 1, 2 & old NCERT)
Chapter 2 Class 7 - Operations with Integers (Ganita Prakash II)
- Quick Recap on Intergers
- Carrom Coin Integers
- Token Model for Adding and Subtracting Integers
- Multiplication of Integers
- Patterns in Integer Multiplication
-
Brahmagupta’s Rules for Multiplication and Division of Integers
- A Magic Grid of Integers
- Division of Integers
- Figure it out - Page 39
- Integer Expressions - Properties and Pattern
- Figure it out - Page 42, 43, 44
Transcript
Example 2 (b) There is an elevator in a mining shaft that moves above and below the ground. The elevator’s positions above the ground are represented as positive integers and positions below the ground are represented as negative integers. (b) If it begins to descend from 15 m above the ground, what will be its position after 45 minutes?Given that Elevator descends into the shaft So, it is going down Now, it moves 3 meters per minute And, we need to find position after 45 minutes Now, Initial Position = 15 m Position after 1 minute = 15 – 3 × 1 Position after 45 minute = 15 – 3 × 45 = 15 – 135 = –135 + 15 = – (135 – 15) = – 120 m Thus, elevator will be 120 metres below the ground.
