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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 410 · 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. 1.53 × 15 =
  2. 2.18 × 15 =
  3. 3.40 × 15 =
  4. 4.19 × 15 =
  5. 5.12 × 15 =
  6. 6.36 × 15 =
  7. 7.15 × 15 =
  8. 8.4 × 15 =
  9. 9.6 × 15 =
  10. 10.38 × 15 =
  11. 11.23 × 15 =
  12. 12.23 × 15 =
  13. 13.48 × 15 =
  14. 14.35 × 15 =
  15. 15.5 × 15 =
  16. 16.47 × 15 =
  17. 17.54 × 15 =
  18. 18.61 × 15 =
  19. 19.5 × 15 =
  20. 20.57 × 15 =
  21. 21.15 × 15 =
  22. 22.21 × 15 =
  23. 23.36 × 15 =
  24. 24.19 × 15 =
  25. 25.47 × 15 =
  26. 26.49 × 15 =
  27. 27.55 × 15 =
  28. 28.16 × 15 =
  29. 29.18 × 15 =
  30. 30.39 × 15 =
  31. 31.4 × 15 =
  32. 32.55 × 15 =
  33. 33.8 × 15 =
  34. 34.8 × 15 =
  35. 35.35 × 15 =
  36. 36.8 × 15 =
  37. 37.36 × 15 =
  38. 38.36 × 15 =
  39. 39.30 × 15 =
  40. 40.16 × 15 =

Answer key

  1. 795
  2. 270
  3. 600
  4. 285
  5. 180
  6. 540
  7. 225
  8. 60
  9. 90
  10. 570
  11. 345
  12. 345
  13. 720
  14. 525
  15. 75
  16. 705
  17. 810
  18. 915
  19. 75
  20. 855
  21. 225
  22. 315
  23. 540
  24. 285
  25. 705
  26. 735
  27. 825
  28. 240
  29. 270
  30. 585
  31. 60
  32. 825
  33. 120
  34. 120
  35. 525
  36. 120
  37. 540
  38. 540
  39. 450
  40. 240

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