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Syllabus

Expressions using Letter-Numbers — Syllabus

CBSE · Class 7 · Mathematics

What Expressions using Letter-Numbers covers in CBSE Class 7 Mathematics: 4 topics, for the 2026-27 session. Part of the CBSE Class 7 Mathematics syllabus.

45 questions56 flashcards8 formulas & key relations5 concepts

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4 Topics · CBSE Class 7 Mathematics · 2026-27

Topics in Expressions using Letter-Numbers

1

1. Letter-numbers and Algebraic Expressions

  • Letters used to represent numbers are called letter-numbers.
  • Expressions containing letter-numbers are called algebraic expressions.
  • Shabnam's age is 3 years more than Aftab's age.
2

2. Revisiting Arithmetic Expressions and Simplification

  • Swapping and grouping of terms does not change the value of an arithmetic expression.
  • Brackets help show which parts must be handled together.
  • A negative sign outside brackets changes the signs inside when the brackets are removed.
3

3. Omission of the Multiplication Symbol

  • In algebra, multiplication signs are often omitted.
  • The number is written first, followed by the letter.
  • Writing 4×n is shortened to 4n.
4

4. Simplifying Perimeter Expressions

  • The perimeter of a rectangle can be written using l and b.
  • l stands for length, b stands for breadth, and p stands for perimeter.
  • The initial perimeter expression and the simplified form are equal in value, though they look different.

Key Concepts

Central concept: Algebraic expressions and patterns using letter-numbers

Letter-numbersAlgebraic expressionsEvaluating expressionsOmission of multiplication signSimplification of algebraic expressionsPatterns and relationships

Work through every topic in Expressions using Letter-Numbers with notes and quizzes

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Frequently Asked Questions

What are the important topics in Expressions using Letter-Numbers for CBSE Class 7 Mathematics?
Key topics in Expressions using Letter-Numbers include Letter-numbers and Algebraic Expressions, Revisiting Arithmetic Expressions and Simplification, Omission of the Multiplication Symbol, Simplifying Perimeter Expressions. Study these first, then practise questions on each for Class 7 exams.
How should I revise Expressions using Letter-Numbers for Class 7 exams?
Learn the core ideas first, then work through the 45 practice questions on Expressions using Letter-Numbers. 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 Syllabus

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