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.
According to the given condition,