0.1 0.2 0.3 0.4 0.5=0在5个数之间加上运算符号和括号，使等式成立!

(0.1+0.2)÷0.3+0.4-0.5=0 (0.1+0.2)-0.3-0.4+0.5=0.1 (0.1+0.2)÷0.3+0.4+0.5=1 (0.1+0.2-0.3)÷0.4x0.5=0