9876乘9876减9875乘9877简便
人气：263 ℃ 时间：2020-06-07 17:49:05
解答
9876×9876-9875×9877
=﹙9875+1﹚×9876-9875×﹙9876+1﹚
=9875×9876-9876×1-9875×9876+9875×1
=9876-9875
=1
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