如题所述
第1个回答 2013-06-13
=0.9*(5.2+0.28)
=0.9*5.48
=(1-0.1)*5.48
=5.48-0.548
=4.932本回答被提问者采纳
=0.9*5.48
=(1-0.1)*5.48
=5.48-0.548
=4.932本回答被提问者采纳
第2个回答 2013-06-13
5.2*(1-0.1)+(1-0.1)*0.28=5.2-0.52+0.28-0.028=4.932
第3个回答 2013-06-13
5.2*0.9+0.9*0.28
=(1-0.1)*(5.2+0.28)
=(1-0.1)*5.48
=5.48-0.548
=4.932
=(1-0.1)*(5.2+0.28)
=(1-0.1)*5.48
=5.48-0.548
=4.932