On selection of "flaps 1" for take-off you will get slats "1" plus flaps "1", that is why it is "1+F".
On approach when you select the very same "Flaps 1" you will get only flaps, not slats.
The amount (degrees) you get depends on whether we are talking A320 or A321 as they are slightly different.
Whilst we are on this subject, and when all the more knowledgeable people turn up on this thread, does anyone know why we usually go straight from flaps 3 to flaps 1, say when reducing flap on the climb out.
Does everyone do this? Why? Why not go to flaps 2 first?
For go-around, we usually raise the flaps one notch, which means you could go from flaps 3 to flaps 2, but would you or would you then go straight to flaps 1 again?
No-ones ever explained the "why" part to me.