1)f) [92-44:(23-3×7)]×10=
=[92-44:(23-21)]×10=
=(92-44:2)×10=
=(92-22)×10=
=70×10=
=700
2)a) (808-a)×2=418
808-a=418:2
808-a=209
a=808-209
a=599
b) (777-a)-258=220
777-a=220+258
777-a=478
a=777-478
a=299
c)(9191-a)+687=2000
9191-a=2000-687
9191-a=1313
a=9191-1313
a=7878
3)a) 150:5=30
b) 150×5=750
c) 150+5=155
d) 150-5=145
4) 11×12=132(fete)
13×12=156(baieti)
156-132=24(mai mulți băieți decat fete)
132+156=288(elevi în scoala)
(13×12)+(11×12)=288
5) (35-32)+(63-32)+(32-15)=
=3+31+17=
=51(lei)
