Doess 0.6 come between 0.5 and 0.55

No.
If you wanted to do this to make it easier, write .5 and .6 with an extra 0
Treat it as if it were a whole number
Does 60 go between 50 and 55? Your answer would be no. But just remember if you do this to remember adding a 0 at the end doesn’t change its value.

There are two bc a studen that equals to 2