32,4:18−1/2⋅[0,225:0,15−5⋅(2/5−0,81:0,9)]=
324/10·1/18-1/2·[225/1000:15/100-5(2/5-81/100:9/10)= se simplifica de fiecare data ce se poate la inmultire
9/5-1/2·[225/1000·100/15-5·(2/5-81/100·10/9)]=
9/5-1/2·[3/2-5·(2/5-9/10)]
9/5-1/2·[3/2--5·(10-9)/10]=
9/5-1/2·[3/2-1/2]=
9/5-1/2·2/2=
9/5-1/2=(18-5)/10=13/10=1,3
