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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 157 · 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. 1.22 × 15 =
  2. 2.16 × 15 =
  3. 3.51 × 15 =
  4. 4.64 × 15 =
  5. 5.9 × 15 =
  6. 6.57 × 15 =
  7. 7.9 × 15 =
  8. 8.4 × 15 =
  9. 9.35 × 15 =
  10. 10.34 × 15 =
  11. 11.43 × 15 =
  12. 12.29 × 15 =
  13. 13.53 × 15 =
  14. 14.21 × 15 =
  15. 15.48 × 15 =
  16. 16.20 × 15 =
  17. 17.19 × 15 =
  18. 18.24 × 15 =
  19. 19.11 × 15 =
  20. 20.11 × 15 =
  21. 21.23 × 15 =
  22. 22.26 × 15 =
  23. 23.34 × 15 =
  24. 24.13 × 15 =
  25. 25.59 × 15 =
  26. 26.27 × 15 =
  27. 27.32 × 15 =
  28. 28.10 × 15 =
  29. 29.24 × 15 =
  30. 30.32 × 15 =
  31. 31.10 × 15 =
  32. 32.62 × 15 =
  33. 33.58 × 15 =
  34. 34.21 × 15 =
  35. 35.64 × 15 =
  36. 36.7 × 15 =
  37. 37.42 × 15 =
  38. 38.30 × 15 =
  39. 39.54 × 15 =
  40. 40.54 × 15 =

Answer key

  1. 330
  2. 240
  3. 765
  4. 960
  5. 135
  6. 855
  7. 135
  8. 60
  9. 525
  10. 510
  11. 645
  12. 435
  13. 795
  14. 315
  15. 720
  16. 300
  17. 285
  18. 360
  19. 165
  20. 165
  21. 345
  22. 390
  23. 510
  24. 195
  25. 885
  26. 405
  27. 480
  28. 150
  29. 360
  30. 480
  31. 150
  32. 930
  33. 870
  34. 315
  35. 960
  36. 105
  37. 630
  38. 450
  39. 810
  40. 810

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