99x999x999=????

用戶200678

2007-07-14 6:31 pm

99x999x999=????

回答 (8)

問題的人↙人的題問

2007-07-14 6:37 pm

✔ 最佳答案

98802099

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熊仔

2007-07-15 2:40 am

99x999x999
=98901x999
=98802099

OR

99x999x999
=(99+1)x(999+1)x(999+1)-99-999-999
=100x1000x1000-99-999-999
=100000x1000-99-999-999
=100000000-99-999-999
=100000000-(99+999+999)
=100000000-(1098+999)
=100000000-2097
=99979030

OR

99x999x999

=(100-1)x(1000-1)x(1000-1)

=(100-1)x(1000000-2000+1)

=100000000-200000+100-1000000+2000-1

=100000000-1000000-200000+2000+100-1

=98802099

2007-07-14 20:31:10 補充：
sorry! 2)：99x999x999=(99 1)x(999 1)x(999 1)-99-999-999=100x1000x1000-99-999-999=100000x1000-99-999-999=100000000-99-999-999=100000000-(99 999 999)=100000000-(1098 999)=100000000-2097=99979030 is wrong ! ! !

參考: me

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Hoi Ki

2007-07-14 8:27 pm

99X999X999
=98901X999
=98802099

參考: 自已

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123

2007-07-14 8:21 pm

=98802099

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Patty

2007-07-14 7:49 pm

99x999x999 = 98,802,099

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HiNhIn

2007-07-14 7:12 pm

99x999x999

=98802099

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2007-07-14 7:06 pm

99x999x999

=98802099

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Alfred

2007-07-14 6:38 pm

98802099

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