Students can Download Chapter 1 Integers Ex 1.2, Question and Answers, Notes Pdf, KSEEB Solutions for Class 7 Maths, Karnataka State Board Solutions help you to revise complete Syllabus and score more marks in your examinations.

## Karnataka State Syllabus Class 7 Maths Chapter 1 Integers Ex 1.2

Question 1.

Write down a pair of integers whose:

a) sum is – 7

– 2 + – 5 = – 7

∴ The two integers be – 2 and – 5.

b) difference is – 7

– 20 – (- 10) = – 10 (∵ – 20 – (- 10))

– 20 + 10 = – 10

∴ The two integers be – 20 and – 10.

c) sum is 0

Any two integers of same number but different sign.

For eg : 10 + (- 10) = 0.

Question 2.

a) Write a pair of negative integers whose difference gives 8.

Solution:

Let -4 and -12 are two negative integers.

∴ -4 – (-12)

-4 + 12 = 8

b) Write a negative integer and a positive integer whose sum is -5.

Solution:

Let -10 and 5

∴ -10 + 5 = -5

c) Write a negative integer and a positive integer whose difference is -3.

Solution:

Let -2 and 1

-2 – (+1)

-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?

Solution:

Team A scored = – 40 + 10 + 0 = – 30

TeamB scored = 10 + 0 – 40 = – 30

Yes. We can add integers in any order.

Question 4.

Fill in the blanks to make the following statements true :

i) (-5) + (-8) = (-8) + (……..)

(-5) + (-8) = (-8) + __(-5)__

ii) 53 + = – 53

-53 + __0__ = -53

iii) 17 + …. 0

17 + __-17__ = 0

iv) 113 + (-12) + (……) = 13 + [(-12) + (-7)]

[13 + (-12) + __(-7)__ = 13 + [(-12) + (-7)]

v) (-4) + [15 + (-3)] = [-4 + 15] + __-3__

(-4) + [15 + (-3)] = [-4 + 15] + __-3.__