Salutare!
a)
(425:5+129×4+2):3×4-127×6+2×29=
(85+516+2):3×4-762+58=
(601+2):3×4-762+58=
603:3×4-762+58=
201×4-762+58=
804-763+58=
42+58=
100
b)
144:3×9-(57×8-97×4+824:4+39×4)=
48×9-(456-388+206+156)=
432-(68+206+156)=
432-(274+156)=
432-430=
2
c)
(543:3+171:9):5+(651:3+3×128+400:100):5=
(181+19):5+(217+384+4):5=
200:5+(601+4):5=
40+605:5=
40+121=
161
d)
981:3-[164+(248:8+4×39+117:9):10]=
327-[164+(31+156+13):10]=
327-[164+(187+13):10]=
327-(164+200:10)=
327-(164+20)=
327-184=
143
e)
1-[107×5-(714:7-792:8)×178]=
1-[107×5-(102-99)×178]=
1-(107×5-3×178)=
1-(535-534)=
1-1=
0
