Division (by 2).
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No, whole numbers are not closed under division. It is possible to divide one whole number by another whole number and get a result which is not a whole number, for example, 1/2. One divided by two is a half.
You do nothing! Two halves = 1 and division by 1 leaves the number unchanged.
Mathematically, an inverse is an opposite, it is something that reverses what its inverse does, for example, addition and subtraction are inverse functions, as are multiplication and division. The inverse of a fraction is obtained by exchanging numerator and denominator; the inverse of a half is two.
The opposite of a number is the number which produces the same result when the opposite or inverse operation is performed.For addition/subtraction, the opposite is the additive inverse or negative value.e.g. 3 - 2 = 1 and 3 + (-2) = 1For multiplication/division, division can be done by multiplication of the inverse value.examples:a) 4 divided by 2, 4 / 2 = 2 and the inverse is multiplication by one half : 4 x (1/2) = 2b) 6 divided by 2/3 is the same as 6 times the inverse, 6 x 3/2 = 18/2 = 9
If there is division in a word problem it will be half, one fourth...