Roman Numerals
Roman Numerals I = 1 IV = 5 -1 = 4 V = 5 IX = 10 -1 = 9 X = 10 XL = 50 – 10 = 40 L = 50 XC = 100 – 10 = 90 C = 100 CM = 1000 – 10 = 900 D = 500 M = 1000 Convert number: 2,020 in Roman numerals, how to write? 1 Break the number (decompose it) into place value subgroups: 2,020 = 2,000 + 20; 2 Convert each subgroup: 2,000 = 1,000 + 1,000 = M + M = MM; 20 = 10 + 10 = X + X = XX; ...