2.107

а) \(176-149=27\);
б) \(639-499=140\);
в) \(67\,005-58\,906=8\,099\);
г) \(39\,067-8\,471=30\,596\);
д) \(2\,222\,222\,222-987\,654\,321=1\,234\,567\,901\);
е) \(1\,234\,567\,890-45\,678\,910=1\,188\,888\,980\).