Răspuns:
a) 417-38+(583-11+583-27)=1507
417-38+(572+556)=
417-38+1128=
379+1128=1507
b) 12-17+35x13+17x23=841
12-17+455+391=
-5+846=841
c) (37x26+58x34)+21x26=
(962+1972)+21x26=
2934+546=3480
d) (4-74+1020)+64x26=
(-70+1020)+64x26=
950+1664=2614
Sper sa fie corect! Succes!