计算:98766×98768-98765×98769
计算:98766×98768-98765×98769....
计算:98766×98768-98765×98769.
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艺吧顶贴组捹湮
2014-09-04
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98766×98768-98765×98769, =(98765+1)×98768-98765×(98768+1), =98765×98768+98768-(98765×98768+98765), =98765×98768+98768-98765×98768-98765, =98768-98765, =3. |
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