NCERT Class 6 Maths Chapter 6 Integers Exercise 6.3


Chapter 6 Integers Exercise 6.3

Question 1: Find
a) 35 - (20)
b) 72 - (90)
c) (- 15) - (- 18)
d) (-20) - (13)
e) 23 - (- 12)
f) (-32) - (- 40)
Answer:

a)
= 35 - 20
= 15

b)
= 72 - 90
= -18

c)
= -15 + 18
= 3
d)
= -20 - 13
= -33

e)
= 23 + 12
= 35

f)
= -32 + 40
= 8

Question 2: Fill in the blanks with >, < or = sign.
a) (- 3) + (- 6) ______ (- 3) - (- 6)
b) (- 21) - (- 10) _____ (- 31) + (- 11)
c) 45 - (- 11) ______ 57 + (- 4)
d) (- 25) - (- 42) _____ (- 42) - (- 25)
Answer:

a)
= (-3) + (-6) = -9
= (-3) - (-6) = -3 + 6 = 3
-9 < 3
Therefore, (-3) + (-6) < (-3) - (-6)

b)
= -21 - (-10) = -21 + 10 = -11
= -31 + (-11) = -42
-11 > -42
Therefore, (-21) - (-10) > (-31) + (-11)

c)
= 45 - (-11) = 45 + 11 = 56
= 57 + (-4) = 57 - 4 = 53
56 > 53
Therefore, 45 - (-11) > 57 + (-4)

d)
= (-25) - (-42) = -25 + 42 = 17
= -42 - (-25) = -42 + 25 = -17
17 > -17
Therefore, (-25) - (-42) > (-42) - (-25)

Question 3: Fill in the blanks.
a) (- 8) + _____ = 0
b) 13 + _____ = 0
c) 12 + (- 12) = ____
d) (- 4) + ____ = - 12
e) ____ - 15 = - 10
Answer:

a) (-8) + 8 = 0
b) 13 + (-13) = 0
c) 12 + (-12) = 0
d) (-4) + (-8) = -12
e) 5 - 15 = -10

Question 4: Find
a) (- 7) - 8 - (- 25)
b) (- 13) + 32 - 8 – 1
c) (- 7) + (- 8) + (- 90)
d) 50 - (- 40) - (- 2)
Answer:

a)
= (-7) - 8 - (-25)
= -7 -8 + 25
= -15 + 25
= 10

b)
= (-13) + 32 - 8 - 1
= -13 + 32 - 8 - 1
= 32 - 22
= 10

c)
= (-7) + (-8) + (-90)
= -7 - 8 - 90
= -105

d)
= 50 - (-40) - (-2)
= 50 + 40 + 2
= 92

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