Question

i) Counting numbers are also called as ___________
ii) The set of natural numbers and zero together form the set of ____________
iii) The set of natural numbers is represented by _________
iv) The set of whole numbers is represented by _________
v) The set of whole numbers and their opposites together form the set of _____________
vi) The set of integers is represented by _________
vii) ______ is neither positive nor negative.
viii) The ____________ of an integer is the value of the integer irrespective of their sign
ix) The absolute value of -8 is _______
x) If a and b are two integers, then a + b = ___________
xi) If a, b and c are any three integers, then a + (b + c) = ____________
xii) ____________ is called the additive identity.
xiii) The additive inverse of (- 17) is __________
xiv) a + _____ = 0
xv) a - _____ = a



2) Solve the following :
i) Evaluate :
a) |(-2) + 1| b) |(-3) + (-4)| c) |5 - (-4)| d) |6 - 8|


ii)Find the sum :
a) 54 , (-24) b) (-38) , 54 c)(-61) , (-52)
d) (-73) , (-12) , (-50) d) 78 , (-37) , 49 e) (-64) , 40 , 55

iii) Subtract :
a) 14 from 9 b) (-15) from (-61) c) (-43) from 23 d) 54 from (-32)

iv) Evaluate :
a) - 45 - 33 b) 26 - (-11)
c) {34 - (+13)} + 32 d) -16 + (25 – 34)

v) If a = 27 , b = -10 and c = 40, show that a - (b - c) ≠ (a - b) - c

vi) From the sum of (- 109) and 312, subtract (- 150).

vii) A number x, added to (- 119) is 201. Find x.

Answer 1

13- (17 )

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Answer 2

Answer:

counting no. are also called natural numbers