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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 798 · 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. 3.5 × 15 =
  4. 4.14 × 15 =
  5. 5.11 × 15 =
  6. 6.24 × 15 =
  7. 7.23 × 15 =
  8. 8.63 × 15 =
  9. 9.12 × 15 =
  10. 10.32 × 15 =
  11. 11.14 × 15 =
  12. 12.20 × 15 =
  13. 13.33 × 15 =
  14. 14.62 × 15 =
  15. 15.44 × 15 =
  16. 16.15 × 15 =
  17. 17.45 × 15 =
  18. 18.7 × 15 =
  19. 19.22 × 15 =
  20. 20.30 × 15 =
  21. 21.63 × 15 =
  22. 22.13 × 15 =
  23. 23.4 × 15 =
  24. 24.43 × 15 =
  25. 25.24 × 15 =
  26. 26.27 × 15 =
  27. 27.30 × 15 =
  28. 28.48 × 15 =
  29. 29.61 × 15 =
  30. 30.62 × 15 =
  31. 31.64 × 15 =
  32. 32.47 × 15 =
  33. 33.18 × 15 =
  34. 34.17 × 15 =
  35. 35.52 × 15 =
  36. 36.58 × 15 =
  37. 37.21 × 15 =
  38. 38.39 × 15 =
  39. 39.16 × 15 =
  40. 40.21 × 15 =

Answer key

  1. 735
  2. 810
  3. 75
  4. 210
  5. 165
  6. 360
  7. 345
  8. 945
  9. 180
  10. 480
  11. 210
  12. 300
  13. 495
  14. 930
  15. 660
  16. 225
  17. 675
  18. 105
  19. 330
  20. 450
  21. 945
  22. 195
  23. 60
  24. 645
  25. 360
  26. 405
  27. 450
  28. 720
  29. 915
  30. 930
  31. 960
  32. 705
  33. 270
  34. 255
  35. 780
  36. 870
  37. 315
  38. 585
  39. 240
  40. 315

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