(i) 57839 - 2983 = 54856
Verification: 54856 + 2983 = 57839
(ii) 92507 - 10879 = 81628
Verification: 81628 + 10879 = 92507
(iii) 400000 - 98798 = 301202
Verification: 301202 + 98798 = 400000
(iv) 5050501 - 969696 = 4080805
Verification: 4080805 + 969696 = 5050501
(v) 200000 - 97531 = 102469
Verification: 102469 + 97531 = 200000
(vi) 3030301 - 868686 = 2161615
Verification: 2161615 + 868686 = 3030301