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Vidaara.orgClass 6 · Mathematics
CodeVID-M06-08-EVL-01
Evaluating Expressions - Assignment
Chapter: Algebraic Expressions
Topic: Evaluating Expressions Given Variable Value
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.
To evaluate an expression, ___ the value of the variable.
  • A.ignore
  • B.substitute
  • C.double
  • D.remove
2.
$2x+1$ at $x=3$ is:
  • A.$5$
  • B.$7$
  • C.$6$
  • D.$9$
3.
$x^2$ at $x=4$ is:
  • A.$8$
  • B.$16$
  • C.$12$
  • D.$6$
4.
Follow the ___ of operations when evaluating.
  • A.reverse
  • B.order
  • C.half
  • D.opposite
5.
$3x$ at $x=5$ is:
  • A.$8$
  • B.$15$
  • C.$35$
  • D.$53$
Section B — Short Answer (2 marks) 4 × 2 = 8 marks
6.
Evaluate $x+4$ at $x=6$.
7.
Evaluate $2x$ at $x=7$.
8.
Evaluate $3x-2$ at $x=4$.
9.
Evaluate $\tfrac{x}{2}$ at $x=10$.
Section C — Short Answer (3 marks) 4 × 3 = 12 marks
10.
Evaluate $2x+3$ at $x=5$.
11.
Evaluate $x^2-1$ at $x=4$.
12.
Evaluate $4x-7$ at $x=3$.
13.
Evaluate $3a+2b$ at $a=2,\ b=5$.
Section D — Long Answer (5 marks) 2 × 5 = 10 marks
14.
Evaluate $2x^2+3x-1$ at $x=3$.
15.
Evaluate $5(a+b)-2a$ at $a=4,\ b=3$.

Answer Key

Section A — Multiple Choice Questions
  1. (B) substitute
  2. (B) $7$
  3. (B) $16$
  4. (B) order
  5. (B) $15$
Section B — Short Answer (2 marks)
  1. $10$.
  2. $14$.
  3. $10$.
  4. $5$.
Section C — Short Answer (3 marks)
  1. $13$.
  2. $15$.
  3. $5$.
  4. $16$.
Section D — Long Answer (5 marks)
  1. $26$.
  2. $27$.
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