✔ 最佳答案
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