Vidaara.orgClass 8 · Mathematics
CodeVID-M08-03-OPI-01
Operations on Integers - Assignment
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.
$(-4)\times(-5)=$
- A.$-20$
- B.$20$
- C.$-9$
- D.$9$
4.
$(-12)\div4=$
- A.$3$
- B.$-3$
- C.$-8$
- D.$8$
5.
The product of two negative integers is:
- A.negative
- B.positive
- C.zero
- D.undefined
Section B — Short Answer (2 marks)
4 × 2 = 8 marks
6.
Evaluate $(-8)+3$.
7.
Evaluate $(-6)-(-10)$.
8.
Evaluate $(-7)\times4$.
9.
Evaluate $(-20)\div(-5)$.
Section C — Short Answer (3 marks)
4 × 3 = 12 marks
10.
Evaluate $(-5)+8-3$.
11.
Evaluate $(-3)\times(-4)\times(-2)$.
12.
Evaluate $(-36)\div6+2$.
13.
Evaluate $5-(-3)+(-8)$.
Section D — Long Answer (5 marks)
2 × 5 = 10 marks
14.
Evaluate $(-4)\times[\,6+(-9)\,]$ using the distributive property.
15.
The temperature was $-3^\circ$C, fell by $7^\circ$C, then rose $5^\circ$C. Find the final temperature.
Answer Key
Section A — Multiple Choice Questions
- (A) $-8$
- (A) $5$
- (B) $20$
- (B) $-3$
- (B) positive
Section B — Short Answer (2 marks)
- $-5$.
- $4$.
- $-28$.
- $4$.
Section C — Short Answer (3 marks)
- $0$.
- $-24$.
- $-4$.
- $0$.
Section D — Long Answer (5 marks)
- $12$.
- $-5^\circ$C.
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