0.3()0.3()0.3()0.3()0.3()0.3=4,在括号内填上运算符号或括号使等式成立

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0.3()0.3()0.3()0.3()0.3()0.3=4,在括号内填上运算符号或括号使等式成立

0.3(+)0.3()0.3()0.3()0.3()0.3=4
(0.3(+)0.3)(÷)0.3(+)(0.3(+)0.3)(÷)0.3=4