81=2*40.5
因此,可以将算式转换为:
82.3-40.5/0.81*1.2
=82.3-100*0.405 /(2*0.405)*1.2
进一步根据除法的定律进行转换:
=82.3-100*0.405 /0.405*1.2/2
=82.3-100*1.2/2
=82.3-100*0.6
=82.3-60
=22.3
匿名回答于2024-05-28 12:45:10