find the value of 'a-b' if " a "and "b" are integers such that b is the predecessor of "a"

**Answer :**

We know " The predecessor of a integer is one less than the given number.Clearly, the predecessor of 1 is 0; predecessor of 2 is 1; predecessor of 3 is 2 and so on. "

And

integers = { ... , -3 , -2 , -1 , 0 , 1, 2 , 3, ... }

So,

if we have b as a predecessor of a than value of ( a - b ) = 1 ( always )

let a = 1 than b = 0 ( as b is predecessor of a )

So,

a - b = 1 - 0 = 1

Or

Let a = - 2 ,So b = - 3 ( as b is predecessor of a )

a - b = - 2 + 3 = 1

So,

**a - b = 1 , when b is predecessor of a . ( Ans)**

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