Mathematics judgment questions in the first grade of primary school

Adding (or subtracting) an integer 10 makes the sum (or difference) an integer 10. (right)

Their counterexample 10- 10=0 is that 0 is not a multiple of 10, but 0 is actually a multiple of 10, that is, it is an integer ten.

The meaning of 0

0 can either mean "nothing" or serve as the boundary of some quantities. Like temperature. 0 is a completely definite number.

0 is a number.

0 is an even number.

0 is a multiple of any natural number (except 0).

0 has the function of occupying space.

0 cannot be partitioned.

0 is a neutral number.