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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 554 · 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. 1.46 × 15 =
  2. 2.10 × 15 =
  3. 3.63 × 15 =
  4. 4.35 × 15 =
  5. 5.24 × 15 =
  6. 6.7 × 15 =
  7. 7.36 × 15 =
  8. 8.18 × 15 =
  9. 9.26 × 15 =
  10. 10.30 × 15 =
  11. 11.37 × 15 =
  12. 12.55 × 15 =
  13. 13.15 × 15 =
  14. 14.56 × 15 =
  15. 15.45 × 15 =
  16. 16.18 × 15 =
  17. 17.27 × 15 =
  18. 18.6 × 15 =
  19. 19.21 × 15 =
  20. 20.18 × 15 =
  21. 21.25 × 15 =
  22. 22.35 × 15 =
  23. 23.32 × 15 =
  24. 24.55 × 15 =
  25. 25.54 × 15 =
  26. 26.11 × 15 =
  27. 27.57 × 15 =
  28. 28.8 × 15 =
  29. 29.25 × 15 =
  30. 30.55 × 15 =
  31. 31.47 × 15 =
  32. 32.43 × 15 =
  33. 33.56 × 15 =
  34. 34.53 × 15 =
  35. 35.24 × 15 =
  36. 36.17 × 15 =
  37. 37.51 × 15 =
  38. 38.7 × 15 =
  39. 39.64 × 15 =
  40. 40.14 × 15 =

Answer key

  1. 690
  2. 150
  3. 945
  4. 525
  5. 360
  6. 105
  7. 540
  8. 270
  9. 390
  10. 450
  11. 555
  12. 825
  13. 225
  14. 840
  15. 675
  16. 270
  17. 405
  18. 90
  19. 315
  20. 270
  21. 375
  22. 525
  23. 480
  24. 825
  25. 810
  26. 165
  27. 855
  28. 120
  29. 375
  30. 825
  31. 705
  32. 645
  33. 840
  34. 795
  35. 360
  36. 255
  37. 765
  38. 105
  39. 960
  40. 210

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