**NCERT Solutions for Class 7 Maths Chapter 1 Integers Ex 1.1****NCERT Solutions for Class 7 Maths Chapter 1 Integers Ex 1.2****NCERT Solutions for Class 7 Maths Chapter 1 Integers Ex 1.3**

**NCERT Solutions for Class 7 Maths Chapter 1 Integers Ex 1.1 (Rationalised Contents)**

**Ex 1.1 Class 7 Maths Question 1.**

### Write down a pair of integers whose:

**(a)** sum is -7

**(b)** difference is -10

**(c)** sum is 0

**Solution.****(a)** A pair of integers whose sum is -7 can be (-2) and (-5). Answers may vary.

∵ (-2) + (-5) = -7**(b)** A pair of integers whose difference is -10 can be (-13) and (-3). Answers may vary.

∵ -13 – (-3) = -13 + 3 = -10**(c)** A pair of integers whose sum is 0 can be 5 and (-5). Answers may vary.

∵ (-5) + (5) = 0

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**Ex 1.1 Class 7 Maths 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.

**Solution.****(a)** A pair of negative integers whose difference gives 8 can be -2 and -10. Answers may vary.

∵ (-2) – (-10) = -2 + 10 = 8**(b)** A negative integer and a positive integer whose sum is -5 can be -10 and 5. Answers may vary.

∵ (-10) + 5 = -10 + 5 = -5**(c)** A negative integer and a positive integer whose difference is -3 can be -2 and 1. Answers may vary.

∵ (-2) – 1 = –2 – 1 = -3

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**Ex 1.1 Class 7 Maths 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?

**Solution.**

Total score of team A = (-40) + 10 + 0

= -40 + 10 + 0 = -30

Total score of team B = 10 + 0 + (-40)

= 10 + 0 – 40 = -30

Since, the total score of each team is equal.

∴ No team scored more than the other but each team has equal score.

Yes, we can add integers in any order and the result remains the same. For example, (-40) + 10 + 0 = -30 = 10 + 0 + (-40)

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**Ex 1.1 Class 7 Maths Question 4.**

### Fill in the blanks to make the following statements true:

**(i)** (-5) + (-8) = (-8) + (………)

**(ii)** -53 + ……. = -53

**(iii)** 17 + …… = 0

**(iv)** [13 + (-12)] + (………..) = 13 + [(-12) + (-7)]

**(v)** (-4) + [15 + (-3)] = [-4 + 15] + …..…

**Solution.****(i)** (-5) + (-8) = (-8) + (**-5**)**(ii)** -53 + **0** = -53**(iii)** 17 + (**-17**) = 0**(iv)** [13 + (-12)] + (**-7**) = 13 + [(-12) + (-7)]**(v)** (-4) + [15 + (-3)] = [-4 + 15] + (**-3**)

**Related Links:**

**NCERT Solutions for Maths Class 8**

**NCERT Solutions for Maths Class 9**

**NCERT Solutions for Maths Class 10**