填上+、-、×、÷或()使等式成立。5 5 5 5 5=0(5-5)÷(5×5+5)=0 5-(5-5)÷5-5=0 (5-5)×5+5-5=0 (5÷5-5÷5)×5=0
5 - 5 - 5- 5- 5