Răspuns :
120-[30•2+(60-20:10)]=
120-[60+(60-2)]=
120-(60+58)=
120-118=
2
[20+(30-10)]×2=
(20+20)×2=
40×2=
80
[(30÷3-2)+10]×2=
[(10-2)+10]×2=
(8+10)×2=
18×2=
36
5×[2+1+(56-6)]×2=
5×(3+50)×2=
5×53×2=
265×2=
530
[(70-50:5)+3]×2=
[(70-10)+3]×2=
(60+3)×2=
63×2=
126