Addition and Subtraction of Expressions Quiz - CBSE Class 8 Mathematics

Free practice quiz: Addition and Subtraction of Expressions (CBSE Class 8 Mathematics). 15 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Simplify the expression: 3x + 2y - x + 5y

   1. 2x + 7y
   2. 4x + 7y
   3. 2x + 3y
   4. 4x + 3y
   Show answer

   Answer: A. 2x + 7y

   Combine like terms: (3x - x) + (2y + 5y) = 2x + 7y

2. What is the result of subtracting (3x² - 2x + 5) from (7x² + 4x - 3)?

   1. 4x² + 6x - 8
   2. 10x² + 2x + 2
   3. 4x² + 6x + 8
   4. 10x² + 6x - 8
   Show answer

   Answer: A. 4x² + 6x - 8

   (7x² + 4x - 3) - (3x² - 2x + 5) = 7x² + 4x - 3 - 3x² + 2x - 5 = 4x² + 6x - 8

3. Simplify: (4x³ - 3x² + 2x - 1) - (2x³ + x² - 5x + 3) + (x³ - 2x² + x)

   1. 3x³ - 6x² + 8x - 4
   2. x³ - 6x² + 8x - 4
   3. 3x³ - 6x² + 8x + 4
   4. x³ + 6x² + 8x - 4
   Show answer

   Answer: A. 3x³ - 6x² + 8x - 4

   4x³ - 3x² + 2x - 1 - 2x³ - x² + 5x - 3 + x³ - 2x² + x = 3x³ - 6x² + 8x - 4

4. From 4m - 3n + 2p, subtract 2m - 4n - p.

   1. 2m + n + 3p
   2. 2m - n + p
   3. 6m - 7n + 3p
   4. 2m + n + p
   Show answer

   Answer: A. 2m + n + 3p

   (4m - 3n + 2p) - (2m - 4n - p) = 4m - 3n + 2p - 2m + 4n + p = 2m + n + 3p

5. Simplify: 4(a + 2b - c) - 2(a - b + 2c)

   1. 2a + 10b - 8c
   2. 2a + 6b - 8c
   3. 2a + 10b - 6c
   4. 6a + 6b - 8c
   Show answer

   Answer: A. 2a + 10b - 8c

   4a + 8b - 4c - 2a + 2b - 4c = 2a + 10b - 8c

More quizzes

• Multiplication and Standard Identities
• Terms, Factors, and Coefficients

Browse all Algebraic Expressions and Identities quizzes