Rozwiązanie:
21 = XXI 21 = 2×10 +1
134 = CXXXIV 134 = 100+3×10+(5-1)
1478 = MCDLXXVIII 1478 = 1000+(500-100) + 50+2x 10 + 5 + 3×1
2014 = MMXIV 2104 = 2×1000+10+(5-1)
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Rozwiązanie:
21 = XXI 21 = 2×10 +1
134 = CXXXIV 134 = 100+3×10+(5-1)
1478 = MCDLXXVIII 1478 = 1000+(500-100) + 50+2x 10 + 5 + 3×1
2014 = MMXIV 2104 = 2×1000+10+(5-1)