NCERT Solutions Class-7 Maths chapter-1 Exercise-1.2
NCERT Solutions class 7 Maths Chapter-1 Integers
Integers Exercise-1.2
NCERT Solutions Class-7 Maths chapter-1 Integer Exercise-1.2 is prepared by academic team of pw all the questions of NCERT text book are solved step by step with proper and detail solutions explaining each and every questions . For More and additional questions of CBSE class 7 maths you can go to class 7 maths sections. NCERT class 7 Maths Solutions is the best way to enhanced your mathematics skill. And pw practice worksheet & question bank will help you a lot .
Solutions of Chapter Integeres Exercise-1.2
Question 1:
Write down a pair of integers whose:
(a) sum is − 7
(b) difference is − 10
(c) sum is 0
Answer:
(a) − 8 + (+1) = −7
(b) − 12 − (−2) = −10
(c) 5 + (−5) = 0
Question 2:
(a) Write a pair of negative integers whose difference gives 8.
(b) Write a negative integer and a positive integer whose sum is − 5.
(c) Write a negative integer and a positive integer whose difference is − 3.
Answer:
(a) −2 − (−10) = 8
(b) −8 + 3 = −5
(c) −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:
Team A scored − 40, 10, 0.
Total score = − 40 + 10 + 0
= −30
Team B scored 10, 0, −40.
Total score = 10 + 0 + (−40)
= −30
∴ The scores of both teams are equal.
Yes, we can add integers in any order. We had observed that the scores obtained by both teams in successive rounds were numerically equal but different in order. Yet, the total score of both teams were equal.
Question 4:
Fill in the blanks to make the following statements true:
(i) (-5) + (-8) = (-8) + (………)
Solution: (i) We have,
(-5) + (-8) = (-8) + (…..)
So,
(-5) + (-8) = (-8) + (-5)
(ii) -53 + …….= -53
Solution: We have,
- 53 + (…..) = - 53
So,
- 53 + (0) = - 53
(iii) 17 + ……. = 0
Solution: We have,
17 + (…..) = 0
So,
17 + (-17) = 0
(iv) [13 + (-12)]+(……..) = 13 +[(-12)+(-7)]
Solution: We have,
[13 + (-12)] + (…..) = 13 + [(-12) + (-7)]
So,
[13 + (-12) + (-7) = 13 + [(-12) + (-7)]
(v) (-4) + [15+(-3)] = [-4+15] + ……
Solution: We have,
(-4) + [15 + (-3)] = [(-4) + 15] + (…..)
So,
(-4) + [15 + (-3)] = [(-4) + 15] + (-3)
NCERT CLASS 7 MATHEMATICS SOLUTIONS
