答案：I made fewer mistakes than you (did).
或：I have made fewer mistakes than you (have).
mistake是可数名词,所以用fewer(few的比较级)而不用less(little的比较级)；
than引导的比较状语从句中的did/have一般会省略,只留下主语you；
根据句意,该句用一般过去时/现在完成时最好.
答案：I made fewer mistakes than you (did).
或：I have made fewer mistakes than you (have).
mistake是可数名词,所以用fewer(few的比较级)而不用less(little的比较级)；
than引导的比较状语从句中的did/have一般会省略,只留下主语you；
根据句意,该句用一般过去时/现在完成时最好.