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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 11 · 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. 1.49 × 15 =
  2. 2.54 × 15 =
  3. 3.61 × 15 =
  4. 4.57 × 15 =
  5. 5.20 × 15 =
  6. 6.62 × 15 =
  7. 7.15 × 15 =
  8. 8.15 × 15 =
  9. 9.33 × 15 =
  10. 10.30 × 15 =
  11. 11.6 × 15 =
  12. 12.62 × 15 =
  13. 13.21 × 15 =
  14. 14.5 × 15 =
  15. 15.17 × 15 =
  16. 16.35 × 15 =
  17. 17.26 × 15 =
  18. 18.19 × 15 =
  19. 19.30 × 15 =
  20. 20.5 × 15 =
  21. 21.51 × 15 =
  22. 22.14 × 15 =
  23. 23.52 × 15 =
  24. 24.10 × 15 =
  25. 25.63 × 15 =
  26. 26.33 × 15 =
  27. 27.59 × 15 =
  28. 28.55 × 15 =
  29. 29.51 × 15 =
  30. 30.8 × 15 =
  31. 31.16 × 15 =
  32. 32.27 × 15 =
  33. 33.35 × 15 =
  34. 34.30 × 15 =
  35. 35.33 × 15 =
  36. 36.30 × 15 =
  37. 37.46 × 15 =
  38. 38.5 × 15 =
  39. 39.14 × 15 =
  40. 40.20 × 15 =

Answer key

  1. 735
  2. 810
  3. 915
  4. 855
  5. 300
  6. 930
  7. 225
  8. 225
  9. 495
  10. 450
  11. 90
  12. 930
  13. 315
  14. 75
  15. 255
  16. 525
  17. 390
  18. 285
  19. 450
  20. 75
  21. 765
  22. 210
  23. 780
  24. 150
  25. 945
  26. 495
  27. 885
  28. 825
  29. 765
  30. 120
  31. 240
  32. 405
  33. 525
  34. 450
  35. 495
  36. 450
  37. 690
  38. 75
  39. 210
  40. 300

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