What im asking is like when a pokemon is grass and fire and its opponent uses a water move super effective against the fire but not very effective on the grass what does it make ??? super effective plus normal??
As Speedy said, but if you want details:
Without effect: x0
Not very effective: x0.5
Regulary effective: x1
Super effective: x2
So, Water attack on Fire/Grass should have NOT VERY - SUPER EFFECTIVITY (1x0.5x2=1) which is same as regular effectivity
No it makes neutral damage, like rock/ground adds the water and grass weakness to make 4x weakness. Posion and flying makes 4x fighting resistance so they cancel or strengthen weaknesses and resistances. also immunities stay immunities