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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 780 · 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. 1.34 × 15 =
  2. 2.64 × 15 =
  3. 3.7 × 15 =
  4. 4.57 × 15 =
  5. 5.19 × 15 =
  6. 6.19 × 15 =
  7. 7.4 × 15 =
  8. 8.10 × 15 =
  9. 9.46 × 15 =
  10. 10.13 × 15 =
  11. 11.23 × 15 =
  12. 12.36 × 15 =
  13. 13.26 × 15 =
  14. 14.58 × 15 =
  15. 15.43 × 15 =
  16. 16.21 × 15 =
  17. 17.58 × 15 =
  18. 18.62 × 15 =
  19. 19.34 × 15 =
  20. 20.14 × 15 =
  21. 21.40 × 15 =
  22. 22.59 × 15 =
  23. 23.43 × 15 =
  24. 24.53 × 15 =
  25. 25.55 × 15 =
  26. 26.26 × 15 =
  27. 27.38 × 15 =
  28. 28.9 × 15 =
  29. 29.38 × 15 =
  30. 30.42 × 15 =
  31. 31.46 × 15 =
  32. 32.17 × 15 =
  33. 33.59 × 15 =
  34. 34.35 × 15 =
  35. 35.24 × 15 =
  36. 36.49 × 15 =
  37. 37.21 × 15 =
  38. 38.35 × 15 =
  39. 39.18 × 15 =
  40. 40.18 × 15 =

Answer key

  1. 510
  2. 960
  3. 105
  4. 855
  5. 285
  6. 285
  7. 60
  8. 150
  9. 690
  10. 195
  11. 345
  12. 540
  13. 390
  14. 870
  15. 645
  16. 315
  17. 870
  18. 930
  19. 510
  20. 210
  21. 600
  22. 885
  23. 645
  24. 795
  25. 825
  26. 390
  27. 570
  28. 135
  29. 570
  30. 630
  31. 690
  32. 255
  33. 885
  34. 525
  35. 360
  36. 735
  37. 315
  38. 525
  39. 270
  40. 270

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