98766×98768-98765×98769简便算要过程

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98766×98768-98765×98769简便算要过程98766×98768-98765×98769简便算要过程98766×98768-98765×98769简便算要过程98766x98768-9

98766×98768-98765×98769简便算要过程
98766×98768-98765×98769简便算要过程

98766×98768-98765×98769简便算要过程
98766x98768-98765x98769
=(98765+1)x98768-98765x(98768+1)
=98765x98768+98768-98765x98768-98765
=98768-98765
=3