(((800 plus 400) plus 400) plus 500) plus 500 = 2600
6300
400 + 1000 = 1400
If you mean CD plus DC then in Roman numerals they add up to M meaning 400 plus 600 = 1000
138
(((800 plus 400) plus 400) plus 500) plus 500 = 2600
800
400 + 40 +4 = 444
400 + 900 + 1000 = 2300
300000 plus 100000 plus 400 plus 290 is equal to 400,690.
6300
450+400+300+350+250=1,750. Obviously.
360,420 is the standard form of 300000 plus 60000 plus 400 plus 20.
400 + 41 = 441
100 + 400 = 500
22 + 400 = 422
600 + 400 = 1000