Questions · Page 2 of 3

1 Mark Question

Question 541 Mark
Fill in the blanks:
(-6) × (____) = 6
Answer
(-6) × (x) = 6
$\text{x}=\frac{6}{-6}$
x = -1
Thus, x = (-1)
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Question 601 Mark
Write a pair of integers whose sum gives:
An integer smaller than only one of the integers.
Answer
Consider the integers 7 and -4. Then, we have: 7 + (-4) = 3, which is smaller than 7 only.
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Question 611 Mark
In a class test containing 10 questions, 5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for each question not attempted.
Reenu gets 5 correct and 5 Incorrect answers. What Is he score?
Answer
Reenu’s score = 5 × 5 + 5 × (-2)
= 25 - 10 = 15
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Question 651 Mark
(-37) × (-7) + (-37) × (-3) = ?
  1. 370
  2. -370
  3. 148
  4. -148
Answer
  1. 370
Solution:

= (-37) × (-7) + (-37) × (-3)

= (-37) × [(-7) + (-3)] [Associative property]

= (-37) × (-10)

= 370
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Question 701 Mark
Which of the following statements are true and which are false?
Multiplication on integers is associative.
Answer
True
Solution:
(a × b) × c = a × (b × c)
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Question 721 Mark
In a class test containing 10 questions, 5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for each question not attempted.
Ravi gets 4 correct and 6 incorrect answers. What is his score? Oil
Answer
We have 5 marks for correct answer and (-2) marks for an incorrect answer.
Now, we have the following:
Ravi’s score = 4 × 5 + 6 × (-2)
= 20 + (-12) = 8
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Question 781 Mark
Write (T) for true and (F) for false for the following statements:
(-6) ÷ 0 = 0
Answer
False
Solution:
As division by zero is not meaning full.
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Question 851 Mark
Which of the following statements are true and which are false?
Multiplication on integers is commutative.
Answer
True
Solution:
a × b = b × a
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Question 871 Mark
In a class test containing 10 questions, 5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for each question not attempted.
Reenu gets 5 correct and 5 Incorrect answers. What Is he score?
Answer
Heena’s score = 2 × 5+ 5 × (-2)
= 10 - 10 = 0
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Question 901 Mark
Write a pair of integers whose sum gives:
A negative integer;
Answer
Consider the integers 2 and (-9). Then, we have: 2 + (-9) = -7, which is a negative integer.
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Question 941 Mark
(-25) × 8 + (-25) × 2 = ?
  1. 250
  2. 150
  3. -250
  4. -150
Answer
  1. -250
Solution:

= (-25) × 8 + (-25) × 2

= (-25) × (8 + 2) [Associative property]

= (-25) × 10 = -250
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Question 971 Mark
Which of the following statements are true and which are false?
Every integer when multiplied with -1 gives its multiplicative inverse.
Answer
False.
Solution:
a × (-1) = -a, which is not the multiplicative inverse of a.
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Question 981 Mark
Write (T) for true and (F) for false for the following statements:
(-8) ÷ 1 = -8
Answer
TrueSolution:
As -a ÷ 1 = -a
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1 Mark Question - Page 2 - Maths STD 7 Questions - Vidyadip