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Revision Notes

Finding the Unknown

CBSE · Class 7 · Mathematics

Quick revision notes for Finding the Unknown — CBSE Class 7 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

73 questions66 flashcards5 concepts

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Key Topics to Revise

1

1. Unknowns, Equations, and Balance

  • An equation is a statement of equality between two algebraic expressions.
  • Solving an equation means finding the letter-number value that makes the left-hand side equal to the right-hand side.
  • A balanced weighing scale is a useful model for equations.
2

2. Patterns and Formulas

  • A pattern can often be described using a formula.
  • The nth position of the matchstick sequence has 2n + 1 matchsticks.
  • This formula helps find the position when the number of matchsticks is given.
3

3. Word Problems with One Unknown

  • A real-life situation can be translated into an equation.
  • Madhubanti’s party problem can be solved by subtracting the fixed delivery charge first, then dividing by the cost per plate.
  • Madhubanti can invite 13 friends.
4

4. Two Unknowns and Simultaneous Thinking

  • Some problems involve two unknown quantities.
  • Ramesh and Suresh have 60 marbles altogether.
  • Ramesh has 30 more marbles than Suresh.

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Full Notes

Key Concepts

An equation is a statementSolving means finding the valueThe number of matchsticks atDifferent values are substituted until oneAddition and subtraction are inverse operations

Frequently Asked Questions

What are the important topics in Finding the Unknown for CBSE Class 7 Mathematics?
Finding the Unknown covers several key topics that are frequently asked in CBSE Class 7 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Finding the Unknown — CBSE Class 7 Mathematics?
Understand the core concepts first, then work through the 73 practice questions available for this chapter. Revise formulas and 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.

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All 15 chapters — CBSE Class 7 Mathematics Revision Notes

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