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Vidaara.orgClass 7 · Mathematics
CodeVID-M07-01-INT-01
Adding & Subtracting Integers - Assignment
Chapter: Rational Numbers
Topic: Adding & Subtracting Positive and Negative Integers
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.
$(-3)+(-5)=$
  • A.$-8$
  • B.$8$
  • C.$2$
  • D.$-2$
2.
$(+7)+(-2)=$
  • A.$5$
  • B.$-5$
  • C.$9$
  • D.$-9$
3.
$5-(-3)=$
  • A.$2$
  • B.$8$
  • C.$-8$
  • D.$-2$
4.
$(-9)+9=$
  • A.$0$
  • B.$18$
  • C.$-18$
  • D.$9$
5.
Adding a negative is the same as:
  • A.adding
  • B.subtracting
  • C.multiplying
  • D.dividing
Section B — Short Answer (2 marks) 4 × 2 = 8 marks
6.
Evaluate $(-8)+3$.
7.
Evaluate $(-6)-(-10)$.
8.
Evaluate $4+(-9)$.
9.
Evaluate $(-2)+(-3)+(-4)$.
Section C — Short Answer (3 marks) 4 × 3 = 12 marks
10.
Evaluate $(-5)+8-3$.
11.
Evaluate $7-(-2)+(-10)$.
12.
Evaluate $(-12)+5-(-4)$.
13.
The temperature rises from $-4^\circ$C by $9^\circ$C. Find the new temperature.
Section D — Long Answer (5 marks) 2 × 5 = 10 marks
14.
A submarine at $-250$ m rises $80$ m, then descends $30$ m. Find its final depth.
15.
Evaluate $(-15)+20+(-8)+5$ and state whether the result is positive or negative.

Answer Key

Section A — Multiple Choice Questions
  1. (A) $-8$
  2. (A) $5$
  3. (B) $8$
  4. (A) $0$
  5. (B) subtracting
Section B — Short Answer (2 marks)
  1. $-5$.
  2. $4$.
  3. $-5$.
  4. $-9$.
Section C — Short Answer (3 marks)
  1. $0$.
  2. $-1$.
  3. $-3$.
  4. $5^\circ$C.
Section D — Long Answer (5 marks)
  1. $-200$ m.
  2. $2$ (positive).
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