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Question 8 - Figure it out - Page 42, 43, 44 - Chapter 2 Class 7 - Operations with Integers (Ganita Prakash II)
Last updated at January 21, 2026 by Teachoo
Figure it out - Page 42, 43, 44
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
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Figure it out - Page 42, 43, 44
Transcript
Question 8 Imagine you’re in a place where the temperature drops by 5°C each hour. If the temperature is currently at 8°C, write an expression which denotes the temperature after 4 hours.Initial temperature = 8°C Room temperature decreases at 5°C per hour ∴ Temperature change in 1 hour = −5°C Temperature change in 4 hours = −5 × 4 = −20°C ∴ Temperature after 4 hours = Initial temperature + Temperature change in 4 hours = 8 + (−20) = 8 – 20 = –20 + 8 = – (20 – 8) = −12°C Thus, temperature after 4 hours is −12°C
