-25-[-16+(1-0.8×3/4)÷(-2)]

问题描述:

-25-[-16+(1-0.8×3/4)÷(-2)]

-25-[-16+(1-0.8×3/4)÷(-2)]
=-25-[-16+0.4÷(-2)]
=-25-(-16.2)
=-25+16.2
=-8.8