计算：=解：0.2²+÷0.125-0.125×3，
=0.04+÷0.125-0.125×3.2，
=0.04+÷0.125-0.4，
=0.04+8.75-0.4，
=8.79-0.4，
=8.39．
故答案为：8.39．
分析：先算出0.2²=0.04，再化简繁分数，最后依据四则运算顺序解答．
点评：本题的难点是繁分数化简．