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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 84 · 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. 1.32 × 15 =
  2. 2.61 × 15 =
  3. 3.25 × 15 =
  4. 4.15 × 15 =
  5. 5.13 × 15 =
  6. 6.45 × 15 =
  7. 7.13 × 15 =
  8. 8.37 × 15 =
  9. 9.10 × 15 =
  10. 10.13 × 15 =
  11. 11.49 × 15 =
  12. 12.54 × 15 =
  13. 13.29 × 15 =
  14. 14.56 × 15 =
  15. 15.54 × 15 =
  16. 16.24 × 15 =
  17. 17.57 × 15 =
  18. 18.31 × 15 =
  19. 19.23 × 15 =
  20. 20.43 × 15 =
  21. 21.42 × 15 =
  22. 22.48 × 15 =
  23. 23.14 × 15 =
  24. 24.33 × 15 =
  25. 25.32 × 15 =
  26. 26.57 × 15 =
  27. 27.40 × 15 =
  28. 28.35 × 15 =
  29. 29.14 × 15 =
  30. 30.13 × 15 =
  31. 31.35 × 15 =
  32. 32.42 × 15 =
  33. 33.21 × 15 =
  34. 34.32 × 15 =
  35. 35.34 × 15 =
  36. 36.17 × 15 =
  37. 37.4 × 15 =
  38. 38.37 × 15 =
  39. 39.58 × 15 =
  40. 40.23 × 15 =

Answer key

  1. 480
  2. 915
  3. 375
  4. 225
  5. 195
  6. 675
  7. 195
  8. 555
  9. 150
  10. 195
  11. 735
  12. 810
  13. 435
  14. 840
  15. 810
  16. 360
  17. 855
  18. 465
  19. 345
  20. 645
  21. 630
  22. 720
  23. 210
  24. 495
  25. 480
  26. 855
  27. 600
  28. 525
  29. 210
  30. 195
  31. 525
  32. 630
  33. 315
  34. 480
  35. 510
  36. 255
  37. 60
  38. 555
  39. 870
  40. 345

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