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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 628 · 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. 1.19 × 15 =
  2. 2.40 × 15 =
  3. 3.31 × 15 =
  4. 4.10 × 15 =
  5. 5.40 × 15 =
  6. 6.30 × 15 =
  7. 7.53 × 15 =
  8. 8.30 × 15 =
  9. 9.34 × 15 =
  10. 10.60 × 15 =
  11. 11.34 × 15 =
  12. 12.64 × 15 =
  13. 13.41 × 15 =
  14. 14.58 × 15 =
  15. 15.6 × 15 =
  16. 16.26 × 15 =
  17. 17.25 × 15 =
  18. 18.11 × 15 =
  19. 19.11 × 15 =
  20. 20.9 × 15 =
  21. 21.12 × 15 =
  22. 22.39 × 15 =
  23. 23.48 × 15 =
  24. 24.54 × 15 =
  25. 25.34 × 15 =
  26. 26.10 × 15 =
  27. 27.39 × 15 =
  28. 28.45 × 15 =
  29. 29.7 × 15 =
  30. 30.7 × 15 =
  31. 31.7 × 15 =
  32. 32.12 × 15 =
  33. 33.52 × 15 =
  34. 34.33 × 15 =
  35. 35.15 × 15 =
  36. 36.11 × 15 =
  37. 37.61 × 15 =
  38. 38.40 × 15 =
  39. 39.47 × 15 =
  40. 40.11 × 15 =

Answer key

  1. 285
  2. 600
  3. 465
  4. 150
  5. 600
  6. 450
  7. 795
  8. 450
  9. 510
  10. 900
  11. 510
  12. 960
  13. 615
  14. 870
  15. 90
  16. 390
  17. 375
  18. 165
  19. 165
  20. 135
  21. 180
  22. 585
  23. 720
  24. 810
  25. 510
  26. 150
  27. 585
  28. 675
  29. 105
  30. 105
  31. 105
  32. 180
  33. 780
  34. 495
  35. 225
  36. 165
  37. 915
  38. 600
  39. 705
  40. 165

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