5/2÷5/3+﹙7/6-3/10﹚÷2/15-﹙5/7×1.6+1/2÷7/5﹚
＝5/2×3/5＋﹙35/30-9/30﹚×15/2-﹙5/7×1.6+0.5×5/7﹚
＝3/2+13/2-1.5
＝13/2
＝6.5