you really dont have to post the roll results. In the games i run, I roll and then justpost what i see happening. Since you have their char sheets already, you should be able to make the rolls and tell them what happens without relying on the player to post "I rolled a 13 with a +4 modifier"
EX-
Rogue: I run forward and draw my rapier and in one motion attempt to run him through.
DM: (secret roll) you charge at him, but he is able to dodge in time, and draws his sword as he counters your thrust with a slash
rogue: I dodge him.
DM: he does a flurry of slashes which misses all but one, which takes you down 4 HP.
EX-
Rogue: I run forward and draw my rapier and in one motion attempt to run him through.
DM: (secret roll) you charge at him, but he is able to dodge in time, and draws his sword as he counters your thrust with a slash
rogue: I dodge him.
DM: he does a flurry of slashes which misses all but one, which takes you down 4 HP.