Yes, it is.
Difference of two natural numbers is not always a natural number.For any two natural numbers a and b, a-b = natural number only when a>b.Otherwise the result is a integer.No, e.g. 6 - 10 = -4. -4 is negative, so it is not a natural number.
is a natural number a whole number
No. -3 is a whole number but it is not a natural number.
A natural number is a number which is positive and a whole number. whole numbers can be also negative.
Yes, the difference of two whole numbers is always a whole number.
No. Rather all natural numbers are necessarily rational number
All negative integers are whole numbers but not natural numbers. Mathematicians are not agreed about whether 0 is a natural number or not.
No. Example: The difference of 2/5 & 1/3: 2/5 - 1/3 = 1/15 ∈ ℚ (is a rational number) ∉ ℕ (is not a natural number).
No, it is not always so.
a rational number is different from a natural number because a rational number can be expressed as a fraction and natural numbers are just countinq numbers =D