3+(15.3:0,3+2,3*0,38) =
3+(15.3:0,3+2,3*0,38) =3+(51+0,874)=3+51,874.
1)15,3/0,3=51 2)2,3*0,38=0,874 3)51+0,874=51,874 4)51,874+3=54,874