7+7-7x2-5+6=

7+7-7x2-5+6
=7+7-14-5+6
=14-14-5+6
=0-5+6
=-1+6
=5

2006-12-16 18:29:35 補充：
it should be 7 7-7x2-5 6=7 7-14-5 6=14-14-5 6=0-5 6=-5 6(-1 6)=1(5)P.S. numbers in '( )' that means the wrong ansar the correct ansar should be 1 not 5

2006-12-16 18:34:30 補充：
記住要在=7 7-7x2-5 6的７x2要按照先乘除,後加減的原理，否則就會便成:=7 7-7x2-5 6=14-7x2-5 6=7*2-5 6=14-5 6=9 6=15那就錯了

2006-12-16 18:39:50 補充：
若你寫成7 7-7x2 6-5就會易計D7 7-7x2 6-5=7 7-7x2 6-5=7 7-14 6-5=14-14 6-5=0 6-5=6-5=1

7+7-7x2-5+6
=7+7-14-5+6
=1

7+7-7x2-5+6=1

7+7-7x2-5+6
=7+7-14-5+6
=14-14-5+6
=0-5+6
=-5+6
=1

7+7-7x2-5+6
=(7+7)-(7x2)-5+6
=(14)-14-5+6
=(14)-19+6
=14-13
=1

7+7-7x2-5+6=
14-14-5+6=
1

7+7-7x2-5+6
=7+7-14-5+6
=14-14-5+6
=0-5+6
=-5+6
=1

=14-14+11
=11

7+7-7x2-5+6
=7+7-14-5+6
=14-14-5+6
=5+6
=11

7+7-7x2-5+6=
　　7+7-7x2-5+6
＝14-14-5+6
=0-5+6
=-5+6
=1

7+7-7x2-5+6= 1

2006-12-16 18:28:16 補充：
7+7-7x2-5+6 =14-14-5+6=-5+6=1