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Printable math worksheet for finding the Greatest Common Factor using the ladder method.

Worksheet titled "Greatest Common Factor" with six problems to find GCF using the ladder method, including example calculation for (20, 30).

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Show Answer Key & Explanations Step-by-step solution for: Greatest Common Factors Worksheets - 15 Worksheets Library

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1. (20, 30)
- Divide by 2: 10, 15
- Divide by 5: 2, 3
- GCF = 2 × 5 = 10

2. (24, 36)
- Divide by 2: 12, 18
- Divide by 2: 6, 9
- Divide by 3: 2, 3
- GCF = 2 × 2 × 3 = 12

3. (25, 45)
- Divide by 5: 5, 9
- GCF = 5

4. (40, 60)
- Divide by 2: 20, 30
- Divide by 2: 10, 15
- Divide by 5: 2, 3
- GCF = 2 × 2 × 5 = 20

5. (30, 60)
- Divide by 2: 15, 30
- Divide by 3: 5, 10
- Divide by 5: 1, 2
- GCF = 2 × 3 × 5 = 30

6. (25, 55)
- Divide by 5: 5, 11
- GCF = 5

Parent Tip: Review the logic above to help your child master the concept of common factor worksheet.

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