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Proportional Reasoning-1 — Study Plan

CBSE · Class 8 · Mathematics

A step-by-step study plan for Proportional Reasoning-1, CBSE Class 8 Mathematics: what to learn first, what to practise and when to revise.

55 questions60 flashcards18 formulas & key relations5 concepts

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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: 1. Ratios and Similar Images, 2. Checking Whether Ratios Are Proportional, 3. Cross Multiplication and Unknown Terms.

2
Day 3

Practise

Solve the textbook exercises and extra practice questions. There are 55 questions available for this chapter.

3
Day 4

Revise & Test

Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.

4
Day 7

Spaced Revision

Come back to Proportional Reasoning-1 after a week. Use flashcards for quick recall and try past exam questions on this chapter.

What to Focus On

  • A ratio compares two quantities in order.
  • Image A has width:height = 60:40.
  • Image C has width:height = 30:20.
  • In a:b, the first term corresponds to the first quantity and the second term to the second quantity.
  • Ratios are reduced using HCF, not LCM.
  • Two ratios are proportional when their simplest forms are equal.
  • a:b::c:d means two ratios are proportional.
  • If a:b::c:d, then ad = bc.
  • The unknown fourth term can be found by d = bc/a.

Common Mistakes to Avoid

Any two similar-looking ratios are proportional.

The order of a ratio does not matter.

A ratio is simplified by dividing by the LCM.

Memory Tips

Width to height ratio of image A is 60:40

Terms of a ratio

Meaning of a ratio a:b

Images A, C, and D are proportional

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Frequently Asked Questions

What are the important topics in Proportional Reasoning-1 for CBSE Class 8 Mathematics?
Key topics in Proportional Reasoning-1 include Ratios and Similar Images, Checking Whether Ratios Are Proportional, Cross Multiplication and Unknown Terms, Rule of Three and Āryabhaṭa. Study these first, then practise questions on each for Class 8 exams.
How should I revise Proportional Reasoning-1 for Class 8 exams?
Learn the core ideas first, then work through the 55 practice questions on Proportional Reasoning-1. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Proportional Reasoning-1

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