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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 173 · 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. 1.54 × 15 =
  2. 2.46 × 15 =
  3. 3.56 × 15 =
  4. 4.62 × 15 =
  5. 5.56 × 15 =
  6. 6.26 × 15 =
  7. 7.36 × 15 =
  8. 8.62 × 15 =
  9. 9.15 × 15 =
  10. 10.15 × 15 =
  11. 11.24 × 15 =
  12. 12.16 × 15 =
  13. 13.48 × 15 =
  14. 14.11 × 15 =
  15. 15.16 × 15 =
  16. 16.21 × 15 =
  17. 17.4 × 15 =
  18. 18.31 × 15 =
  19. 19.64 × 15 =
  20. 20.64 × 15 =
  21. 21.18 × 15 =
  22. 22.27 × 15 =
  23. 23.27 × 15 =
  24. 24.33 × 15 =
  25. 25.6 × 15 =
  26. 26.37 × 15 =
  27. 27.42 × 15 =
  28. 28.6 × 15 =
  29. 29.60 × 15 =
  30. 30.38 × 15 =
  31. 31.32 × 15 =
  32. 32.40 × 15 =
  33. 33.5 × 15 =
  34. 34.61 × 15 =
  35. 35.11 × 15 =
  36. 36.6 × 15 =
  37. 37.43 × 15 =
  38. 38.64 × 15 =
  39. 39.30 × 15 =
  40. 40.9 × 15 =

Answer key

  1. 810
  2. 690
  3. 840
  4. 930
  5. 840
  6. 390
  7. 540
  8. 930
  9. 225
  10. 225
  11. 360
  12. 240
  13. 720
  14. 165
  15. 240
  16. 315
  17. 60
  18. 465
  19. 960
  20. 960
  21. 270
  22. 405
  23. 405
  24. 495
  25. 90
  26. 555
  27. 630
  28. 90
  29. 900
  30. 570
  31. 480
  32. 600
  33. 75
  34. 915
  35. 165
  36. 90
  37. 645
  38. 960
  39. 450
  40. 135

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