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Negative numbers can be extended endlessly on a number line left to 0, it follows that we can represent each and every negative number by some point on this line.

For instance, starting from 0 and moving to its left, a point after 750 units, represent the integer -750.

Thus each and every integer can be represented by some point on this number line.

-1, -5, -3.8, -8/9, -0.5

Example: - Which number is less than -5.

a) -1

b) -2

c) 0

d) 10

e) -10

Clearly we can observe that -1, -2, 0, 10 are right to -5. So -10 is less than -5 because -10 lie to the left of -5 on a number line.

Add the following: -

a) (-1) + (-5) + (-2)

b) (-3) + (-4)

a) (-1) + (-5) + (-2)= -1-5-2 =-7

b) (-3) +(-4)= -3-4 -7