Question

calculati asociind convenabil termenii . 899+576+201; 391+280+220+109; 2005+768+32+995+19;

Answer 1

(899+201)+576=1100+576=1676

(391+109)+(280+220)=500+500=1000

(2005+995)+(768+32)+19=3000+800+19=3819

Answer 2

899+576+201=(899+201)+576=
1100+576=1676;
391+280+220+109=(391+109)+(280+220)=500+500=1000;
2005+768+32+995+19=(2005+995)+
(768+32)+19=3000+800+19=3800+
19=3819;
Nu e musai sa pui parantezele, eu le-am pus doar ca sa scot in evidenta modul in care am asociat termenii.