﹙1／4＋1／6－1／2﹚÷﹙﹣1／12﹚
=1/4÷﹙﹣1／12﹚+1/6÷﹙﹣1／12﹚ -1/2÷﹙﹣1／12﹚
= -1/4×12 -1/6×12 +1/2×12
= -3 -2 +6
= 1
望采纳哦,谢谢.祝：学习进步!