3.5+五分之四+0.8*7.5-80% (4.8-1.6+五分之四)*7.5%

问题描述:

3.5+五分之四+0.8*7.5-80% (4.8-1.6+五分之四)*7.5%

3.5+五分之四+0.8*7.5-80%
=3.5+6
=9.5
(4.8-1.6+五分之四)*7.5%
=4×3/40
=0.3