+2与-2是一对相反数,请赋予它实际的意义:_.
+2与-2是一对相反数,请赋予它实际的意义:______.
数学人气:342 ℃时间:2019-08-21 15:40:55
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如果水库的水位高于标准水位2m时,记作+2m,那么低于标准水位2m时,应记作-2m(答案不唯一).
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