The numbers on the chart are a little shorthand... if a pokemon is weak to something, the damage it'll take is twice the normal amount. If it is strong against something, it'll take damage half the amount. In a case like Soren's with fighting types, those two cancel out, and the damage is normal.
[A beat, and then he holds up two fingers.]
Let's say this is normal damage.
That would make this- [Four fingers] Damage for what you're weak against. And this [One finger] Is damage for what you're strong against.
...And they stack. Therefore, if both types are strong against something - say, A steel and rock type hit by a normal move... [And now he bends his one finger half way down] This, if your damage. Now, if both types are weak - like when Linda attacks a flying and water type-
[He brings up his second hand and holds up eight fingers] This is the damage.
october 4th
[A beat, and then he holds up two fingers.]
Let's say this is normal damage.
That would make this- [Four fingers] Damage for what you're weak against. And this [One finger] Is damage for what you're strong against.
...And they stack. Therefore, if both types are strong against something - say, A steel and rock type hit by a normal move... [And now he bends his one finger half way down] This, if your damage. Now, if both types are weak - like when Linda attacks a flying and water type-
[He brings up his second hand and holds up eight fingers] This is the damage.