1/4(2√2+√3)-2/3π
=0.25×（2.828+1.732）-0.667÷3.142
=0.25×4.56-0.212
=1.14-0.212
=0.928
≈0.93
说明：因为题目要求精确到百分位,因此,计算过程中,要保留到千分位.