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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 569 · 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. 2.36 × 15 =
  3. 3.61 × 15 =
  4. 4.33 × 15 =
  5. 5.10 × 15 =
  6. 6.38 × 15 =
  7. 7.28 × 15 =
  8. 8.20 × 15 =
  9. 9.24 × 15 =
  10. 10.62 × 15 =
  11. 11.63 × 15 =
  12. 12.40 × 15 =
  13. 13.59 × 15 =
  14. 14.28 × 15 =
  15. 15.54 × 15 =
  16. 16.4 × 15 =
  17. 17.30 × 15 =
  18. 18.51 × 15 =
  19. 19.44 × 15 =
  20. 20.34 × 15 =
  21. 21.57 × 15 =
  22. 22.20 × 15 =
  23. 23.12 × 15 =
  24. 24.37 × 15 =
  25. 25.39 × 15 =
  26. 26.19 × 15 =
  27. 27.56 × 15 =
  28. 28.40 × 15 =
  29. 29.35 × 15 =
  30. 30.61 × 15 =
  31. 31.53 × 15 =
  32. 32.19 × 15 =
  33. 33.20 × 15 =
  34. 34.29 × 15 =
  35. 35.12 × 15 =
  36. 36.60 × 15 =
  37. 37.55 × 15 =
  38. 38.35 × 15 =
  39. 39.31 × 15 =
  40. 40.36 × 15 =

Answer key

  1. 780
  2. 540
  3. 915
  4. 495
  5. 150
  6. 570
  7. 420
  8. 300
  9. 360
  10. 930
  11. 945
  12. 600
  13. 885
  14. 420
  15. 810
  16. 60
  17. 450
  18. 765
  19. 660
  20. 510
  21. 855
  22. 300
  23. 180
  24. 555
  25. 585
  26. 285
  27. 840
  28. 600
  29. 525
  30. 915
  31. 795
  32. 285
  33. 300
  34. 435
  35. 180
  36. 900
  37. 825
  38. 525
  39. 465
  40. 540

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