Name________________________________ Period______ Date



Name________________________________ Period______ Date___________________

Factorization

Find the prime factorization for each of these numbers by making a factor tree. Check your answers with a calculator.

1. 72 2. 80 3. 250 4. 400

5. 640 6. 100 7. 1, 225 8. 390

9. 405 10. 360 11. 128 12. 90

13. 140 14. 294 15. 462 16. 720

17. 264 18. 81 19. 144 20. 1680

Name ____ANSWER KEY______________ Period______ Date___________________

Factorization

Find the prime factorization for each of these numbers by making a factor tree. Check your answers with a calculator.

1. 72 2. 80 3. 250 4. 400

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5. 640 6. 100 7. 1, 225 8. 390

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9. 405 10. 360 11. 128 12. 90

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13. 140 14. 294 15. 462 16. 720

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17. 264 18. 81 19. 144 20. 1680

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