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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 134 · 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. 1.36 × 15 =
  2. 2.62 × 15 =
  3. 3.37 × 15 =
  4. 4.53 × 15 =
  5. 5.7 × 15 =
  6. 6.11 × 15 =
  7. 7.28 × 15 =
  8. 8.33 × 15 =
  9. 9.57 × 15 =
  10. 10.18 × 15 =
  11. 11.21 × 15 =
  12. 12.27 × 15 =
  13. 13.9 × 15 =
  14. 14.29 × 15 =
  15. 15.34 × 15 =
  16. 16.60 × 15 =
  17. 17.64 × 15 =
  18. 18.37 × 15 =
  19. 19.28 × 15 =
  20. 20.40 × 15 =
  21. 21.40 × 15 =
  22. 22.64 × 15 =
  23. 23.45 × 15 =
  24. 24.54 × 15 =
  25. 25.21 × 15 =
  26. 26.27 × 15 =
  27. 27.58 × 15 =
  28. 28.36 × 15 =
  29. 29.49 × 15 =
  30. 30.28 × 15 =
  31. 31.45 × 15 =
  32. 32.25 × 15 =
  33. 33.47 × 15 =
  34. 34.58 × 15 =
  35. 35.30 × 15 =
  36. 36.7 × 15 =
  37. 37.55 × 15 =
  38. 38.9 × 15 =
  39. 39.36 × 15 =
  40. 40.42 × 15 =

Answer key

  1. 540
  2. 930
  3. 555
  4. 795
  5. 105
  6. 165
  7. 420
  8. 495
  9. 855
  10. 270
  11. 315
  12. 405
  13. 135
  14. 435
  15. 510
  16. 900
  17. 960
  18. 555
  19. 420
  20. 600
  21. 600
  22. 960
  23. 675
  24. 810
  25. 315
  26. 405
  27. 870
  28. 540
  29. 735
  30. 420
  31. 675
  32. 375
  33. 705
  34. 870
  35. 450
  36. 105
  37. 825
  38. 135
  39. 540
  40. 630

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