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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 847 · 40 questions
TalentJR

The fast method (Ten and half again): Multiply by 10: 46 → 460. Halve that answer: half of 460 is 230. Add the two: 460 + 230 = 690.

NameDateTime takenScore ___ / 40
  1. 1.4 × 15 =
  2. 2.17 × 15 =
  3. 3.23 × 15 =
  4. 4.17 × 15 =
  5. 5.11 × 15 =
  6. 6.26 × 15 =
  7. 7.49 × 15 =
  8. 8.5 × 15 =
  9. 9.20 × 15 =
  10. 10.21 × 15 =
  11. 11.36 × 15 =
  12. 12.42 × 15 =
  13. 13.23 × 15 =
  14. 14.36 × 15 =
  15. 15.20 × 15 =
  16. 16.58 × 15 =
  17. 17.44 × 15 =
  18. 18.51 × 15 =
  19. 19.61 × 15 =
  20. 20.40 × 15 =
  21. 21.6 × 15 =
  22. 22.4 × 15 =
  23. 23.46 × 15 =
  24. 24.63 × 15 =
  25. 25.36 × 15 =
  26. 26.4 × 15 =
  27. 27.64 × 15 =
  28. 28.32 × 15 =
  29. 29.27 × 15 =
  30. 30.56 × 15 =
  31. 31.27 × 15 =
  32. 32.46 × 15 =
  33. 33.58 × 15 =
  34. 34.8 × 15 =
  35. 35.49 × 15 =
  36. 36.25 × 15 =
  37. 37.64 × 15 =
  38. 38.28 × 15 =
  39. 39.20 × 15 =
  40. 40.34 × 15 =

Answer key

  1. 60
  2. 255
  3. 345
  4. 255
  5. 165
  6. 390
  7. 735
  8. 75
  9. 300
  10. 315
  11. 540
  12. 630
  13. 345
  14. 540
  15. 300
  16. 870
  17. 660
  18. 765
  19. 915
  20. 600
  21. 90
  22. 60
  23. 690
  24. 945
  25. 540
  26. 60
  27. 960
  28. 480
  29. 405
  30. 840
  31. 405
  32. 690
  33. 870
  34. 120
  35. 735
  36. 375
  37. 960
  38. 420
  39. 300
  40. 510

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