What equals to 28?

Answer 1

There are infinitely many possible answers, for example,

0.1 + 27.9

0.2 + 27.8

0.3 + 27.7 and so on

or

0.01 + 27.99

0.02 + 27.98 and so on

or numbers to 3, 4, infinitely many decimal digits.

1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+13

and similar examples which, when you allow negative numbers, can be infinitely long.

Next, there are multiplications:

1 * 28

10 * 2.8

100*0.28