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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 680 · 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. 1.8 × 15 =
  2. 2.30 × 15 =
  3. 3.33 × 15 =
  4. 4.52 × 15 =
  5. 5.34 × 15 =
  6. 6.54 × 15 =
  7. 7.36 × 15 =
  8. 8.5 × 15 =
  9. 9.34 × 15 =
  10. 10.19 × 15 =
  11. 11.57 × 15 =
  12. 12.37 × 15 =
  13. 13.23 × 15 =
  14. 14.18 × 15 =
  15. 15.26 × 15 =
  16. 16.34 × 15 =
  17. 17.38 × 15 =
  18. 18.23 × 15 =
  19. 19.46 × 15 =
  20. 20.5 × 15 =
  21. 21.57 × 15 =
  22. 22.47 × 15 =
  23. 23.57 × 15 =
  24. 24.15 × 15 =
  25. 25.21 × 15 =
  26. 26.64 × 15 =
  27. 27.51 × 15 =
  28. 28.51 × 15 =
  29. 29.4 × 15 =
  30. 30.34 × 15 =
  31. 31.30 × 15 =
  32. 32.19 × 15 =
  33. 33.20 × 15 =
  34. 34.6 × 15 =
  35. 35.23 × 15 =
  36. 36.38 × 15 =
  37. 37.58 × 15 =
  38. 38.62 × 15 =
  39. 39.49 × 15 =
  40. 40.25 × 15 =

Answer key

  1. 120
  2. 450
  3. 495
  4. 780
  5. 510
  6. 810
  7. 540
  8. 75
  9. 510
  10. 285
  11. 855
  12. 555
  13. 345
  14. 270
  15. 390
  16. 510
  17. 570
  18. 345
  19. 690
  20. 75
  21. 855
  22. 705
  23. 855
  24. 225
  25. 315
  26. 960
  27. 765
  28. 765
  29. 60
  30. 510
  31. 450
  32. 285
  33. 300
  34. 90
  35. 345
  36. 570
  37. 870
  38. 930
  39. 735
  40. 375

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