RBSE Solutions for Class 7 Maths Chapter 1 Integers Ex 1.2

Rajasthan Board RBSE Solutions for Class 7 Maths Chapter 1 Integers Ex 1.2 Textbook Exercise Questions and Answers.

RBSE Class 7 Maths Solutions Chapter 1 Integers Ex 1.2

Question 1.
Write down a pair of integers whose:
(a) sum is - 7
Answer:
(- 3) + (- 4) = - 7

(b) difference is - 10
Answer:
(- 7) - 3 = - 10

(c) sum is 0.
Answer:
(- 2) + 2 = 0

Question 2.
(a) Write a pair of negative integers whose difference gives 8.
Answer:
(- 5) - (- 13) = - 5 + 13 = 8

(b) Write a negative integer and a positive integer whose sum is - 5.
Answer:
(- 15) + 10 = - 5

(c) Write a negative integer and a positive integer whose difference is - 3.
Answer:
(- 2) - (1) = - 3

Question 3.
In a quiz, team A scored - 40, 10, 0 and team B scored 10, 0, - 40 in three successive rounds. Which team scored more? Can we say that we can add integers in any order?
Answer:
Scores of team A = (- 40) + 10 + 0 = - 30
Total scores of team B = 10 + 0 + (- 40) = - 30, hence both team scored equal.
Yes, we can add integers in any order (by commutative property).

Question 4.
Fill in the blanks to make the following statements true:
(i) (- 5) + (- 8) = (- 8) + ( ................. )
Answer:
(-5) (Commutative property)

(ii) - 53 + .................. = - 53
Answer:
0 (Additive inverse property)

(iii) 17 + ................ = 0
Answer:
(-17) (Additive identity property)

(iv) [13 + (- 12)] + ( .................. ) = 13 + [(- 12) + (- 7)]
Answer:
(-7) (Associative property)

(v) (- 4) + [15 + (-3)] = [- 4 + 15] + .....................
Answer:
(-3) (Associative property)