7-5+9x5x5+6-9x5+5-1=?

=192 (先乘除後加減)

192...........

7-5+9x5x5+6-9x5+5-1=192

~~~~~~~~7-5+9x5x5+6-9x5+5-1~~~~~~~~~~~~~~~~~~
~~~~~~~~=7-5+{(9x5=45)x5=225}+6-{9x5=45)+5-1~~~~
~~~~~~~~=7-5+225+6-45+5-1~~~~~~~~~~~~~~~~~~~
~~~~~~~~=2+225+6-45+5-1~~~~~~~~~~~~~~~~~~~~
~~~~~~~~=227+6-45+5-1~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~=233-45+5-1~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~=188+5-1~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~=193-1~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~=192//~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~(not copy & paste)~~~~~~~~~~~~~~

=1364

先拆開條題目,
加括號,
=7 - 5 + ( 9x5x5 ) + 6 - ( 9x5 ) + 5 - 1
= 2 + 225 + 6 - 45 + 4
=192

7-5+9x5x5+6-9x5+5-1=?
=7-5+225+6-45+5-1
=2+225+6-45+5-1
=227+6-45+5-1
=233-45+5-1
=188+5-1
=193-1
=192

7-5+9x5x5+6-9x5+5-1=192

7-5+9x5x5+6-9x5+5-1
= 192

7-5+9x5x5+6-9x5+5-1=192

答案282

2007-05-01 16:13:46 補充：
答案不是282,=192sorry

2007-05-01 16:15:13 補充：
你將2+45×5+6-45+4=192

2007-05-03 21:29:53 補充：
將9×5×5=225+2+6-45+4=192