Ответ:\(2\,000+541=2\,000+500+40+1=2\,541\).\(1\,523+100=1\,623\).\(5\,264-4=5\,260\).\(3\,745-1\,000=2\,745\).Ответ: 2 541; 1 623; 5 260; 2 745.