数学题在线解答9999*9998-9998*9997-9997*9996+9996*9995

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数学题在线解答9999*9998-9998*9997-9997*9996+9996*9995

数学题在线解答9999*9998-9998*9997-9997*9996+9996*9995
数学题在线解答9999*9998-9998*9997-9997*9996+9996*9995

数学题在线解答9999*9998-9998*9997-9997*9996+9996*9995
9999*9998-9998*9997-9997*9996+9996*9995
=9998(9999-9997)+9996(9995-9997)
=9998*2-9996*2
=(9998-9996)*2
=2*2
=4

4

4

99840097971703719840