Sele sithethile kwityeli elidlulileyo malunga amanani amaRoma kunye neenzuzo zayo namhlanje. Ewe, umxholo njengoko usazi ubanzi kakhulu kwaye kufuneka sihloniphe ezithile izithethe nemigaqo. Amanani amaRoma asetyenziswa kuphela nge oonobumba abakhulu unobumba ngamnye wabelwe a inani lamanani. Lowo ingangumgaqo osisiseko, kodwa ayisiyiyo kuphela.
Ukuba uza kusebenzisa iileta zamaRoma, zama ukuyenzela amanani ezahluko kunye nemiqulu yomsebenzi; amagama oopopu, ookumkani, nabalawuli, kunye neenkomfa, ukuqeshwa, indibano, njl.
Umthetho I : Apha siza kukubonisa ifayile ye- amaxabiso ahambelanayo unobumba ngamnye
Iileta: IVXLCDM
Imilinganiselo: 1 5 10 50 100 500 1.000
Umzekelo: XVI = 16; I-LXVI = 66; DC = 600 MD = 1,500
Umgaqo II : Ukuba kukho encinci phakathi kwamanani amabini, yona izakususa ixabiso layo ukuya kwelandelayo.
Imizekelo: XIX = (20 - 1) 19; I-LIV = (55-1) 54; I-CXXIX = (130 - 1) 129
Umgaqo III : Khumbula ungaze ubeke unobumba ofanayo ngaphezu kwamatyeli amathathu ngokulandelelana. Kumaxesha amandulo u "Ndi" okanye u "X" ngamanye amaxesha ubonwa kude kube kane ngokulandelelana.
Imizekelo: XIII = 13; XIV = 14; I-XXXIII = 33; I-XXXIV = 34
Umgaqo IV : Ukwenzela i Ixabiso elingaphezulu kwama-4000, umgca othe tyaba uza kubekwa ngaphezulu kwesimboli, eya kubonisa ukuba uphawu luyophindaphindwa nge-1000. Umzekelo:
• _
• V (5,000)
• _
•X(10,000)
• _
L (50,000)
• _
• C(100,000)
• _
ID (500,000)
• _
• M (1'000,000)
Umthetho v : Unokuvunyelwa Iimpawu ezi-2 ezisele kwinani elinye okoko nje bengadibani (Umzekelo CMIX = 909)