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Vidaara.orgClass 8 · Mathematics
CodeVID-M08-05-AOP-01
Adding, Subtracting & Multiplying Expressions - Assignment
Chapter: Algebraic Expressions
Topic: Adding, Subtracting & Multiplying Expressions
Maximum Marks: 35
Time: 75 minutes
Name: ____________________ Roll No.: __________ Date: ____________

General Instructions

  • All questions are compulsory.
  • Section A carries 1 mark each, Section B 2 marks, Section C 3 marks and Section D 5 marks.
  • Show all working for Sections B, C and D. Only final answers are given at the end — for full solutions, raise your doubts with your teacher.
Section A — Multiple Choice Questions 5 × 1 = 5 marks
1.
$3x+5x=$
  • A.$8x$
  • B.$15x$
  • C.$8x^2$
  • D.$2x$
2.
$7y-2y=$
  • A.$5y$
  • B.$9y$
  • C.$5$
  • D.$5y^2$
3.
$2x\times4x=$
  • A.$6x$
  • B.$8x$
  • C.$8x^2$
  • D.$6x^2$
4.
$x(x+3)=$
  • A.$x^2+3$
  • B.$x^2+3x$
  • C.$2x+3$
  • D.$3x^2$
5.
Only ___ terms can be added or subtracted.
  • A.like
  • B.unlike
  • C.positive
  • D.negative
Section B — Short Answer (2 marks) 4 × 2 = 8 marks
6.
Add $4a+3a$.
7.
Subtract $9b-5b$.
8.
Multiply $3x\times2y$.
9.
Expand $2(x+4)$.
Section C — Short Answer (3 marks) 4 × 3 = 12 marks
10.
Add $(3x+2y)$ and $(5x-y)$.
11.
Subtract $(4a-3b)$ from $(7a+2b)$.
12.
Multiply $3x(2x-5)$.
13.
Simplify $2(x+3)+3(x-1)$.
Section D — Long Answer (5 marks) 2 × 5 = 10 marks
14.
Simplify $(2x^2+3x-1)+(x^2-5x+4)-(x^2-2x)$.
15.
Multiply $(x+3)(x+5)$ and $(2x-1)(x+4)$.

Answer Key

Section A — Multiple Choice Questions
  1. (A) $8x$
  2. (A) $5y$
  3. (C) $8x^2$
  4. (B) $x^2+3x$
  5. (A) like
Section B — Short Answer (2 marks)
  1. $7a$.
  2. $4b$.
  3. $6xy$.
  4. $2x+8$.
Section C — Short Answer (3 marks)
  1. $8x+y$.
  2. $3a+5b$.
  3. $6x^2-15x$.
  4. $5x+3$.
Section D — Long Answer (5 marks)
  1. $2x^2+3$.
  2. $x^2+8x+15$ and $2x^2+7x-4$.
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