Răspuns :
Răspuns:
Irina a calculat mai rapid
(9996+4)+(2357-4)=10000+2353=12353
adaugam 4 unitati ca sa facem zece mii si scadem 4 unitati de la celalalt termen
(20995+5)+(4587-5}=21000+4582=25582
(17995+5)+(2135-5)=18000+2130=20130
Răspuns:
Irina a calculat mai rapid
(9996+4)+(2357-4)=10000+2353=12353
adaugam 4 unitati ca sa facem zece mii si scadem 4 unitati de la celalalt termen
(20995+5)+(4587-5}=21000+4582=25582
(17995+5)+(2135-5)=18000+2130=20130