What does "round normally" mean with 0.5?
0.1 - 0.4 becomes 0, 0.5 - 0.9 becomes 1
There are basically 3 types of Rounding: Round UP, Round Down, Round Normal
Round Up, any decimals will always become the next higher number. i.e 3.1, 4.5, 7.8 become: 4, 5, and 8 respectively.
Round Down, any decimals go to the next lower number, so 3.1, 4.5, 7.8 become: 3, 4, and 7 respectively
And of course,
Round Normal: 3.1, 4.5, 7.8 become: 3, 5, and 8 respectively