5/14÷[ 6/7x(2/3+1/6)]运用通分相加，颠倒相乘=5/14÷[ 6/7x(4/6+1/6)]=5/14÷[ 6/7x5/6]=5/14÷30/42=5/14x42/30 (5对30 14对42 )=3/6=1/2满意请采纳
不
