Calculati: 13*15-18:2. 3*(42-30:6). Va rog frumos!!!

Răspuns :

13×15-18:2 = 195 - 9 = 186
3× (42-30:6)= 3×(42-5) =3×37= 111
13•15-18:2=
195-9=
186

3•(42-30:6)=
3•(42-5)=
3•37=
111