Class 8MathematicsAlgebraic Expressions and Identities

Using Identities for Calculation

Mental math with identities: 103² = (100+3)² = 10000+600+9 = 10609. 97² = (100-3)² = 10000-600+9 = 9409. 103×97 = (100+3)(100-3) = 100²-3² = 10000-9 = 9991. Much faster than direct multiplication! These same identities appear in advanced algebra and calculus.

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Practice the 10 example pages one by one.
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10 example pages

Concept check 1

For Class 8 Mathematics, explain or solve a using identities for calculation question from the chapter "Algebraic Expressions and Identities". Focus on concept check and show the working clearly.

Definition to application 2

For Class 8 Mathematics, explain or solve a using identities for calculation question from the chapter "Algebraic Expressions and Identities". Focus on definition to application and show the working clearly.

Formula warm-up 3

For Class 8 Mathematics, explain or solve a using identities for calculation question from the chapter "Algebraic Expressions and Identities". Focus on formula warm-up and show the working clearly.

Reasoning practice 4

For Class 8 Mathematics, explain or solve a using identities for calculation question from the chapter "Algebraic Expressions and Identities". Focus on reasoning practice and show the working clearly.

Board-style short answer 5

For Class 8 Mathematics, explain or solve a using identities for calculation question from the chapter "Algebraic Expressions and Identities". Focus on board-style short answer and show the working clearly.

Mistake correction 6

For Class 8 Mathematics, explain or solve a using identities for calculation question from the chapter "Algebraic Expressions and Identities". Focus on mistake correction and show the working clearly.

Visual interpretation 7

For Class 8 Mathematics, explain or solve a using identities for calculation question from the chapter "Algebraic Expressions and Identities". Focus on visual interpretation and show the working clearly.

Applied word problem 8

For Class 8 Mathematics, explain or solve a using identities for calculation question from the chapter "Algebraic Expressions and Identities". Focus on applied word problem and show the working clearly.

Revision challenge 9

For Class 8 Mathematics, explain or solve a using identities for calculation question from the chapter "Algebraic Expressions and Identities". Focus on revision challenge and show the working clearly.

Exam recap 10

For Class 8 Mathematics, explain or solve a using identities for calculation question from the chapter "Algebraic Expressions and Identities". Focus on exam recap and show the working clearly.