计算:(-8又2分之1)-[-(+6.5)-(-3.3)-6又5分之1]

问题描述:

计算:(-8又2分之1)-[-(+6.5)-(-3.3)-6又5分之1]

(-8又2分之1)-[-(+6.5)-(-3.3)-6又5分之1]
=-8.5-(-6.5+3.3-6.2)
=-8.5-(-3.2-6.2)
=-8.5-(-9.4)
=-8.5+9.4
=0.9