在下列算式的空格内填上适当的“+”或“-”适合等于零（_1/2）+（_1/3）+（_1/6）
在下列算式的空格内填上适当的“+”或“-”适合等于零（_1/2）+（_1/3）+（_1/6）
数学人气：973 ℃时间：2020-05-14 16:10:29
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+ - -或者- + +
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