9999乘99999998001

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9999乘999999980019999乘999999980019999乘999999980019999×9999=9999×(10000-1)=99990000-9999=99980001自问自答很

9999乘99999998001
9999乘9999
9998001

9999乘99999998001
9999×9999
=9999×(10000-1)
=99990000-9999
=99980001

自问自答很爽吧

9998001

9999乘9999
=9999×（1000-1）
=99991000-9999
=9998001
祝你开心！

9999乘99999998001 1乘2乘2乘2222乘3333乘4444乘5555乘6666乘7777乘8888乘9999等于几? 3333乘6666乘9999乘2222的简便算法 9999乘6666乘21+3333乘55 99乘999乘9999=? 9999乘8+1111乘28=( ) 9999乘7+1111乘37等于? 9999乘7+1111乘37 简算9999乘7778+3333乘6666 9999乘 22222 3333乘33334简算 9999乘7778+3333乘6666 9999乘7778加3333乘6666 7778乘9999加3333乘6666 9999乘9999+1999 9999乘9999 9999乘999997等于 99999乘9999 9乘9999个九是几