举报
tigerzhanglonghu
3又8分之3×9-3-0.375 =0.375*(3*9-1)-3 =9.75-3 =6.75 999×222+333×334 =333*222*3+333*334 =333*(666+334) =333000 12又4分之1-(3又5分之2+2.25-3.6) =12.25-2.25-3.4+3.6 =10.2 【19+19×(1.9-1又10分之9÷0.95】÷0.38 =[19+19*1.9-2]/0.38 =[19*(1+1.9)-2]*100/38 =19*2.9*100/38-2*100/38 =-5310/38 =-139又14/19