Roman numeral conversion worksheet for practicing reading and writing numbers up to 1000.

Let's solve this step-by-step. The worksheet asks you to:

1. Convert Roman numerals to Arabic (standard) numbers
2. Convert Arabic numbers to Roman numerals

We’ll use the standard Roman numeral values:
- I = 1
- V = 5
- X = 10
- L = 50
- C = 100
- D = 500
- M = 1000

Part 1: Convert Roman Numerals to Numbers

Rules to remember:
- When a smaller numeral appears before a larger one, subtract it (e.g., IV = 4).
- Otherwise, add the values.

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#### 1) CC = ?
C = 100 → CC = 100 + 100 = 200

#### 2) CL = ?
C = 100, L = 50 → 100 + 50 = 150

#### 3) CDV = ?
CD = 400 (because C = 100, D = 500 → 500 - 100 = 400), V = 5 → 400 + 5 = 405

#### 4) DLX = ?
D = 500, L = 50, X = 10 → 500 + 50 + 10 = 560

#### 5) CML = ?
CM = 900 (C before M → 1000 - 100 = 900), L = 50 → 900 + 50 = 950

#### 6) CXXV = ?
C = 100, XX = 20, V = 5 → 100 + 20 + 5 = 125

#### 7) DLVI = ?
D = 500, L = 50, V = 5, I = 1 → 500 + 50 + 5 + 1 = 556

#### 8) CXC = ?
C = 100, XC = 90 (X before C → 100 - 10 = 90) → 100 + 90 = 190

#### 9) DCCX = ?
D = 500, CC = 200, X = 10 → 500 + 200 + 10 = 710

#### 10) DLXXII = ?
D = 500, L = 50, XX = 20, II = 2 → 500 + 50 + 20 + 2 = 572

#### 11) CLXXIX = ?
C = 100, L = 50, XX = 20, IX = 9 → 100 + 50 + 20 + 9 = 179

#### 12) DCCLXX = ?
D = 500, CC = 200, L = 50, XX = 20 → 500 + 200 + 50 + 20 = 770

#### 13) CMXXXVII = ?
CM = 900, XXX = 30, VII = 7 → 900 + 30 + 7 = 937

#### 14) DCLXXXIV = ?
D = 500, C = 100, L = 50, XXX = 30, IV = 4 → 500 + 100 + 50 + 30 + 4 = 684

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Part 2: Convert Numbers to Roman Numerals

Now convert each number using the reverse process.

#### 1) 150 = ?
100 = C, 50 = L → CL

#### 2) 320 = ?
300 = CCC, 20 = XX → CCCXX

#### 3) 615 = ?
600 = DC, 15 = XV → DCXV

#### 4) 94 = ?
90 = XC, 4 = IV → XCIV

#### 5) 412 = ?
400 = CD, 12 = XII → CDXII

#### 6) 541 = ?
500 = D, 40 = XL, 1 = I → DXLI

#### 7) 225 = ?
200 = CC, 25 = XXV → CCXXV

#### 8) 532 = ?
500 = D, 30 = XXX, 2 = II → DXXXII

#### 9) 809 = ?
800 = DCCC, 9 = IX → DCCCIX

#### 10) 674 = ?
600 = DC, 70 = LXX, 4 = IV → DCLXXIV

#### 11) 298 = ?
200 = CC, 90 = XC, 8 = VIII → CCXCVIII

#### 12) 943 = ?
900 = CM, 40 = XL, 3 = III → CMXLIII

#### 13) 477 = ?
400 = CD, 70 = LXX, 7 = VII → CDLXXVII

#### 14) 839 = ?
800 = DCCC, 30 = XXX, 9 = IX → DCCCXXXIX

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✔ Final Answers:

#### Part 1: Roman to Number
1) CC = 200
2) CL = 150
3) CDV = 405
4) DLX = 560
5) CML = 950
6) CXXV = 125
7) DLVI = 556
8) CXC = 190
9) DCCX = 710
10) DLXXII = 572
11) CLXXIX = 179
12) DCCLXX = 770
13) CMXXXVII = 937
14) DCLXXXIV = 684

#### Part 2: Number to Roman
1) 150 = CL
2) 320 = CCCXX
3) 615 = DCXV
4) 94 = XCIV
5) 412 = CDXII
6) 541 = DXLI
7) 225 = CCXXV
8) 532 = DXXXII
9) 809 = DCCCIX
10) 674 = DCLXXIV
11) 298 = CCXCVIII
12) 943 = CMXLIII
13) 477 = CDLXXVII
14) 839 = DCCCXXXIX

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✔ All answers are now complete and verified! Let me know if you'd like a printable version or explanation for any specific one.