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Revision Notes

Finding the Unknown — Revision Notes

CBSE · Class 7 · Mathematics

Finding the Unknown revision notes for CBSE Class 7 Mathematics: 4 topics in quick points. Part of the CBSE Class 7 Mathematics syllabus.

73 questions66 flashcards8 formulas & key relations5 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?
Key topics in Finding the Unknown include Unknowns, Equations, and Balance, Patterns and Formulas, Word Problems with One Unknown, Two Unknowns and Simultaneous Thinking. Study these first, then practise questions on each for Class 7 exams.
How should I revise Finding the Unknown for Class 7 exams?
Learn the core ideas first, then work through the 73 practice questions on Finding the Unknown. 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.

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All CBSE Class 7 Mathematics Revision Notes

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