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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 629 · 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. 1.44 × 15 =
  2. 2.13 × 15 =
  3. 3.25 × 15 =
  4. 4.26 × 15 =
  5. 5.23 × 15 =
  6. 6.11 × 15 =
  7. 7.54 × 15 =
  8. 8.14 × 15 =
  9. 9.36 × 15 =
  10. 10.25 × 15 =
  11. 11.6 × 15 =
  12. 12.44 × 15 =
  13. 13.5 × 15 =
  14. 14.55 × 15 =
  15. 15.9 × 15 =
  16. 16.41 × 15 =
  17. 17.29 × 15 =
  18. 18.43 × 15 =
  19. 19.46 × 15 =
  20. 20.39 × 15 =
  21. 21.34 × 15 =
  22. 22.4 × 15 =
  23. 23.33 × 15 =
  24. 24.16 × 15 =
  25. 25.14 × 15 =
  26. 26.12 × 15 =
  27. 27.7 × 15 =
  28. 28.13 × 15 =
  29. 29.40 × 15 =
  30. 30.23 × 15 =
  31. 31.37 × 15 =
  32. 32.21 × 15 =
  33. 33.27 × 15 =
  34. 34.7 × 15 =
  35. 35.9 × 15 =
  36. 36.59 × 15 =
  37. 37.64 × 15 =
  38. 38.47 × 15 =
  39. 39.51 × 15 =
  40. 40.8 × 15 =

Answer key

  1. 660
  2. 195
  3. 375
  4. 390
  5. 345
  6. 165
  7. 810
  8. 210
  9. 540
  10. 375
  11. 90
  12. 660
  13. 75
  14. 825
  15. 135
  16. 615
  17. 435
  18. 645
  19. 690
  20. 585
  21. 510
  22. 60
  23. 495
  24. 240
  25. 210
  26. 180
  27. 105
  28. 195
  29. 600
  30. 345
  31. 555
  32. 315
  33. 405
  34. 105
  35. 135
  36. 885
  37. 960
  38. 705
  39. 765
  40. 120

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