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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 706 · 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. 1.26 × 15 =
  2. 2.8 × 15 =
  3. 3.55 × 15 =
  4. 4.52 × 15 =
  5. 5.4 × 15 =
  6. 6.19 × 15 =
  7. 7.54 × 15 =
  8. 8.41 × 15 =
  9. 9.34 × 15 =
  10. 10.57 × 15 =
  11. 11.17 × 15 =
  12. 12.62 × 15 =
  13. 13.18 × 15 =
  14. 14.6 × 15 =
  15. 15.29 × 15 =
  16. 16.58 × 15 =
  17. 17.16 × 15 =
  18. 18.38 × 15 =
  19. 19.23 × 15 =
  20. 20.59 × 15 =
  21. 21.57 × 15 =
  22. 22.52 × 15 =
  23. 23.52 × 15 =
  24. 24.38 × 15 =
  25. 25.44 × 15 =
  26. 26.55 × 15 =
  27. 27.21 × 15 =
  28. 28.64 × 15 =
  29. 29.44 × 15 =
  30. 30.47 × 15 =
  31. 31.28 × 15 =
  32. 32.9 × 15 =
  33. 33.41 × 15 =
  34. 34.19 × 15 =
  35. 35.59 × 15 =
  36. 36.47 × 15 =
  37. 37.16 × 15 =
  38. 38.30 × 15 =
  39. 39.35 × 15 =
  40. 40.53 × 15 =

Answer key

  1. 390
  2. 120
  3. 825
  4. 780
  5. 60
  6. 285
  7. 810
  8. 615
  9. 510
  10. 855
  11. 255
  12. 930
  13. 270
  14. 90
  15. 435
  16. 870
  17. 240
  18. 570
  19. 345
  20. 885
  21. 855
  22. 780
  23. 780
  24. 570
  25. 660
  26. 825
  27. 315
  28. 960
  29. 660
  30. 705
  31. 420
  32. 135
  33. 615
  34. 285
  35. 885
  36. 705
  37. 240
  38. 450
  39. 525
  40. 795

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