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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 543 · 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. 1.7 × 15 =
  2. 2.23 × 15 =
  3. 3.52 × 15 =
  4. 4.26 × 15 =
  5. 5.9 × 15 =
  6. 6.47 × 15 =
  7. 7.60 × 15 =
  8. 8.19 × 15 =
  9. 9.13 × 15 =
  10. 10.21 × 15 =
  11. 11.33 × 15 =
  12. 12.7 × 15 =
  13. 13.23 × 15 =
  14. 14.44 × 15 =
  15. 15.64 × 15 =
  16. 16.54 × 15 =
  17. 17.54 × 15 =
  18. 18.43 × 15 =
  19. 19.13 × 15 =
  20. 20.16 × 15 =
  21. 21.50 × 15 =
  22. 22.28 × 15 =
  23. 23.53 × 15 =
  24. 24.30 × 15 =
  25. 25.64 × 15 =
  26. 26.48 × 15 =
  27. 27.27 × 15 =
  28. 28.10 × 15 =
  29. 29.9 × 15 =
  30. 30.46 × 15 =
  31. 31.58 × 15 =
  32. 32.14 × 15 =
  33. 33.38 × 15 =
  34. 34.44 × 15 =
  35. 35.36 × 15 =
  36. 36.5 × 15 =
  37. 37.38 × 15 =
  38. 38.57 × 15 =
  39. 39.10 × 15 =
  40. 40.6 × 15 =

Answer key

  1. 105
  2. 345
  3. 780
  4. 390
  5. 135
  6. 705
  7. 900
  8. 285
  9. 195
  10. 315
  11. 495
  12. 105
  13. 345
  14. 660
  15. 960
  16. 810
  17. 810
  18. 645
  19. 195
  20. 240
  21. 750
  22. 420
  23. 795
  24. 450
  25. 960
  26. 720
  27. 405
  28. 150
  29. 135
  30. 690
  31. 870
  32. 210
  33. 570
  34. 660
  35. 540
  36. 75
  37. 570
  38. 855
  39. 150
  40. 90

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