Let's solve each problem step by step. We are adding Roman numerals and converting the sum into both
Arabic numbers and
Roman numerals.
We'll use the following Roman numeral values:
- I = 1
- V = 5
- X = 10
- L = 50
And the standard rules:
- When a smaller numeral is before a larger one, subtract it (e.g., IV = 4, IX = 9).
- Otherwise, add them (e.g., VI = 6, XV = 15).
---
Problem 1: XV + VI
- XV = 15
- VI = 6
- 15 + 6 = 21 → XXI
✔ (already given)
---
Problem 2: XII + XI
- XII = 12
- XI = 11
- 12 + 11 = 23 → XXIII
✔ Answer:
23,
XXIII
---
Problem 3: XV + XV
- XV = 15
- 15 + 15 = 30 → XXX
✔ Answer:
30,
XXX
---
Problem 4: XI + IX
- XI = 11
- IX = 9
- 11 + 9 = 20 → XX
✔ Answer:
20,
XX
---
Problem 5: XXV + XI
- XXV = 25
- XI = 11
- 25 + 11 = 36 → XXXVI
✔ Answer:
36,
XXXVI
---
Problem 6: XX + XX
- XX = 20
- 20 + 20 = 40 → XL
✔ Answer:
40,
XL
---
Problem 7: XXV + VIII
- XXV = 25
- VIII = 8
- 25 + 8 = 33 → XXXIII
✔ Answer:
33,
XXXIII
---
Problem 8: XIV + XI
- XIV = 14
- XI = 11
- 14 + 11 = 25 → XXV
✔ Answer:
25,
XXV
---
Problem 9: XIX + XII
- XIX = 19
- XII = 12
- 19 + 12 = 31 → XXXI
✔ Answer:
31,
XXXI
---
Problem 10: XXX + XII
- XXX = 30
- XII = 12
- 30 + 12 = 42 → XLII
✔ Answer:
42,
XLII
---
Problem 11: XXXI + XV
- XXXI = 31
- XV = 15
- 31 + 15 = 46 → XLVI
✔ Answer:
46,
XLVI
---
Problem 12: XXV + IX
- XXV = 25
- IX = 9
- 25 + 9 = 34 → XXXIV
✔ Answer:
34,
XXXIV
---
Problem 13: XIV + IX
- XIV = 14
- IX = 9
- 14 + 9 = 23 → XXIII
✔ Answer:
23,
XXIII
---
Problem 14: XX + XXIII
- XX = 20
- XXIII = 23
- 20 + 23 = 43 → XLIII
✔ Answer:
43,
XLIII
---
Problem 15: XXII + XVI
- XXII = 22
- XVI = 16
- 22 + 16 = 38 → XXXVIII
✔ Answer:
38,
XXXVIII
---
Problem 16: XXXIV + XV
- XXXIV = 34
- XV = 15
- 34 + 15 = 49 → XLIX
✔ Answer:
49,
XLIX
---
Final Completed Table:
| # | Roman Addition | Number | Numeral |
|---|----------------|--------|---------|
| 1) | XV + VI | 21 | XXI |
| 2) | XII + XI | 23 | XXIII |
| 3) | XV + XV | 30 | XXX |
| 4) | XI + IX | 20 | XX |
| 5) | XXV + XI | 36 | XXXVI |
| 6) | XX + XX | 40 | XL |
| 7) | XXV + VIII | 33 | XXXIII |
| 8) | XIV + XI | 25 | XXV |
| 9) | XIX + XII | 31 | XXXI |
|10) | XXX + XII | 42 | XLII |
|11) | XXXI + XV | 46 | XLVI |
|12) | XXV + IX | 34 | XXXIV |
|13) | XIV + IX | 23 | XXIII |
|14) | XX + XXIII | 43 | XLIII |
|15) | XXII + XVI | 38 | XXXVIII |
|16) | XXXIV + XV | 49 | XLIX |
✔ All answers are now filled in correctly!
Let me know if you'd like this as a printable PDF or need help understanding any specific conversion!
Parent Tip: Review the logic above to help your child master the concept of roman numeral dates worksheet.
