As with shooting, you can speed this process up by counting how many models in your unit are fighting and how many attacks each of those models makes, and rolling one or more batches of dice.
However, if your fighting rank contains models that have different characteristics (such as Weapon Skill or Strength), models that are equipped with weapons that have different profiles, or models that are directing their attacks towards targets with different characteristics, the target numbers required To Hit or To Wound may vary. In such cases, you must roll different batches of dice, making it clear to your opponent what each batch represents and the target numbers you need.