计算:9-2sin45°-(3.14-pi)^0+1/2√8-2^3

问题描述:

计算:9-2sin45°-(3.14-pi)^0+1/2√8-2^3

原式=9-2×1/2-1+1/2×2√2-8
=9-1-1+√2-8
=√2-1