Q. 5. To find sum of three numbers
and
we can have two ways:
(a) We may first add and
to get
and then add
to it to get the total sum
or
(b) We may add and
to get
and then add
to get the sum
Thus,
This can be done for any three numbers. This property is known as the associativity of addition of numbers. Express this property which we have already studied in the chapter on Whole Numbers, in a general way, by using variables a, b and c.