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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 877 · 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. 1.52 × 15 =
  2. 2.12 × 15 =
  3. 3.57 × 15 =
  4. 4.34 × 15 =
  5. 5.62 × 15 =
  6. 6.62 × 15 =
  7. 7.14 × 15 =
  8. 8.38 × 15 =
  9. 9.5 × 15 =
  10. 10.62 × 15 =
  11. 11.60 × 15 =
  12. 12.19 × 15 =
  13. 13.31 × 15 =
  14. 14.50 × 15 =
  15. 15.36 × 15 =
  16. 16.63 × 15 =
  17. 17.22 × 15 =
  18. 18.27 × 15 =
  19. 19.62 × 15 =
  20. 20.14 × 15 =
  21. 21.49 × 15 =
  22. 22.14 × 15 =
  23. 23.35 × 15 =
  24. 24.17 × 15 =
  25. 25.13 × 15 =
  26. 26.62 × 15 =
  27. 27.16 × 15 =
  28. 28.32 × 15 =
  29. 29.5 × 15 =
  30. 30.10 × 15 =
  31. 31.16 × 15 =
  32. 32.52 × 15 =
  33. 33.34 × 15 =
  34. 34.40 × 15 =
  35. 35.15 × 15 =
  36. 36.19 × 15 =
  37. 37.7 × 15 =
  38. 38.46 × 15 =
  39. 39.30 × 15 =
  40. 40.22 × 15 =

Answer key

  1. 780
  2. 180
  3. 855
  4. 510
  5. 930
  6. 930
  7. 210
  8. 570
  9. 75
  10. 930
  11. 900
  12. 285
  13. 465
  14. 750
  15. 540
  16. 945
  17. 330
  18. 405
  19. 930
  20. 210
  21. 735
  22. 210
  23. 525
  24. 255
  25. 195
  26. 930
  27. 240
  28. 480
  29. 75
  30. 150
  31. 240
  32. 780
  33. 510
  34. 600
  35. 225
  36. 285
  37. 105
  38. 690
  39. 450
  40. 330

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