dau coroana va rog ajutatima

a)
819×[(560×100-100×208)÷100]=288288
819×[(56000-20800)÷100]=288288
819×(35200÷100)=288288
819×352=288288
b)
3×907+214×2-2×145=2859
2721+428-290=2859
3149-290=2859
c)
9456÷48+4896÷36=61
197-136=61
d)
(6750+7425)÷45=315
14175÷45=315
e)
(450×100+450×100)÷1000=90
(45000+45000)÷1000=90
90000÷1000=90