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1减负2等于几
更新时间: 2020-07-07 00:00:00  

同号两数相加,取相同的符号,并把他们的绝对值相加。不同号两数相加取绝对值较大的数的符号,并用绝对值较大的减去绝对值较小的。不同号两数相减,负负得正。零加减任何数,都等于原数。任何数加减零,都等于原数。

关键词: 减负 等于

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