What gives you 98?

Answer 1

There are infinitely many possible answers:

0+98, 1+97, 2+96 and so on.

Or, using number to 1 dp, 0.1+97.9, 0.2+97.8 and so on.

or you could use numbers to2 dp, 3 dp, ... infinitely many dp.

Next, you can try sums of 3 numbers, sums of 4 numbers, and so on ... all the way to infinitely many numbers (they do not all have to be positive).

And then you can try multiplications:

1*98, 1*1*98, 1*1*2*49 and so on.

or 10*9.8

and on and on and on.