28.5-(2.1-0.63-0.37)怎样简便计算
问题描述:
28.5-(2.1-0.63-0.37)怎样简便计算
答
28.5-(2.1-0.63-0.37)
=28.5-(2.1-1)
=28.5-1.1
=27.4应该是28.5-(2.1-0.63-0.37)=28.5-2.1-(0.63+0.37)=26.4+1=27.4吧