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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 237 · 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. 1.45 × 15 =
  2. 2.46 × 15 =
  3. 3.62 × 15 =
  4. 4.18 × 15 =
  5. 5.48 × 15 =
  6. 6.34 × 15 =
  7. 7.16 × 15 =
  8. 8.60 × 15 =
  9. 9.5 × 15 =
  10. 10.21 × 15 =
  11. 11.42 × 15 =
  12. 12.30 × 15 =
  13. 13.55 × 15 =
  14. 14.11 × 15 =
  15. 15.5 × 15 =
  16. 16.29 × 15 =
  17. 17.6 × 15 =
  18. 18.9 × 15 =
  19. 19.62 × 15 =
  20. 20.6 × 15 =
  21. 21.33 × 15 =
  22. 22.28 × 15 =
  23. 23.12 × 15 =
  24. 24.59 × 15 =
  25. 25.22 × 15 =
  26. 26.63 × 15 =
  27. 27.6 × 15 =
  28. 28.57 × 15 =
  29. 29.11 × 15 =
  30. 30.11 × 15 =
  31. 31.27 × 15 =
  32. 32.10 × 15 =
  33. 33.21 × 15 =
  34. 34.42 × 15 =
  35. 35.8 × 15 =
  36. 36.62 × 15 =
  37. 37.19 × 15 =
  38. 38.12 × 15 =
  39. 39.22 × 15 =
  40. 40.27 × 15 =

Answer key

  1. 675
  2. 690
  3. 930
  4. 270
  5. 720
  6. 510
  7. 240
  8. 900
  9. 75
  10. 315
  11. 630
  12. 450
  13. 825
  14. 165
  15. 75
  16. 435
  17. 90
  18. 135
  19. 930
  20. 90
  21. 495
  22. 420
  23. 180
  24. 885
  25. 330
  26. 945
  27. 90
  28. 855
  29. 165
  30. 165
  31. 405
  32. 150
  33. 315
  34. 630
  35. 120
  36. 930
  37. 285
  38. 180
  39. 330
  40. 405

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