Question

Which of the following correctly represents the sum 45 + 100 = 145 in terms of Roman numerals?

• A. XLV + C = CXLV
• B. XLV + C = CLXV
• C. XVL + D = DXLV
• D. XCV + L = CXLV

Answer 1

The correct option is A XLV + C = CXLV

When a Roman numeral with the larger value is on the left, we add the values together and when it is on the right, we subtract the values.

Thus, 45 = 40 + 5
= (50 - 10) + 5
= XL + V
= XLV.

100 = C

145 = 100 + 40 + 5 = C + XL + V = CXLV.

Thus, the sum 45 + 100 = 145 in terms of Roman numerals is represented by the sum XLV + C = CXLV.