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The chapter discusses the concepts of direct and inverse proportions, illustrating how changes in one quantity affect another. Through various examples and activities, it highlights relationships where quantities increase or decrease together or inversely. The chapter further delves into practical applications, enabling students to understand and apply these mathematical principles in real-life situations.
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NCERT Study MaterialClass Notes
Memorization
What we have learnt
- Direct proportion involves ...
- Inverse proportion pertains...
- Real-world applications of ...
Final Test
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Chapter FAQs
What we have learnt
- Direct proportion involves quantities that increase or decrease together while maintaining a constant ratio.
- Inverse proportion pertains to situations where an increase in one quantity results in the corresponding decrease of another, with their product remaining constant.
- Real-world applications of these concepts enhance understanding and practical problem-solving skills.
Key Concepts
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Term: Direct Proportion
Definition: A relationship where two quantities increase or decrease together, keeping their ratio constant.
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Term: Inverse Proportion
Definition: A relationship where one quantity increases while the other decreases, such that the product of the two quantities remains constant.
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Term: Unitary Method
Definition: A mathematical technique to find the value of one unit and then use it to find the value of multiple units.