Whole Numbers T...

If $$a$$ and $$b$$ are two whole numbers, then commutative law is applicable to subtraction if and only if ________.

How many whole numbers are there between 25 and 82?

$$8989900$$ is the successor of 

If $$(31 + 15) + x = 31 + (15 + 23)$$, then by using associativity of addition $$x= $$

 If $$ x + 12 = 12 + 7$$, then by commutatively of addition, we get$$ x=? $$

Which one of the following is not a natural number?

Mark the correct alternative of the following.
The predecessor of $$1$$ in whole numbers is?

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How many three digit numbers are there in all?

Mark the correct alternative of the following.
The product of the successor and predecessor of $$99$$ is?

Mark the correct alternative of the following.
The predecessor of $$1$$ million is?