1( )2( )3( )4( )5( )6( )7( )8( )9=10 括号中只能填“+”“-”
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1( )2( )3( )4( )5( )6( )7( )8( )9=10 括号中只能填“+”“-”
1( )2( )3( )4( )5( )6( )7( )8( )9=10 括号中只能填“+”“-”
1( )2( )3( )4( )5( )6( )7( )8( )9=10 括号中只能填“+”“-”
无解,其中有5个奇数,只用加减,结果只会是奇数,不会是偶数.