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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 846 · 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. 1.56 × 15 =
  2. 2.39 × 15 =
  3. 3.36 × 15 =
  4. 4.57 × 15 =
  5. 5.28 × 15 =
  6. 6.62 × 15 =
  7. 7.7 × 15 =
  8. 8.26 × 15 =
  9. 9.48 × 15 =
  10. 10.7 × 15 =
  11. 11.38 × 15 =
  12. 12.55 × 15 =
  13. 13.46 × 15 =
  14. 14.39 × 15 =
  15. 15.5 × 15 =
  16. 16.48 × 15 =
  17. 17.21 × 15 =
  18. 18.60 × 15 =
  19. 19.7 × 15 =
  20. 20.32 × 15 =
  21. 21.38 × 15 =
  22. 22.38 × 15 =
  23. 23.58 × 15 =
  24. 24.42 × 15 =
  25. 25.18 × 15 =
  26. 26.9 × 15 =
  27. 27.31 × 15 =
  28. 28.9 × 15 =
  29. 29.61 × 15 =
  30. 30.9 × 15 =
  31. 31.28 × 15 =
  32. 32.37 × 15 =
  33. 33.61 × 15 =
  34. 34.23 × 15 =
  35. 35.36 × 15 =
  36. 36.4 × 15 =
  37. 37.23 × 15 =
  38. 38.25 × 15 =
  39. 39.60 × 15 =
  40. 40.26 × 15 =

Answer key

  1. 840
  2. 585
  3. 540
  4. 855
  5. 420
  6. 930
  7. 105
  8. 390
  9. 720
  10. 105
  11. 570
  12. 825
  13. 690
  14. 585
  15. 75
  16. 720
  17. 315
  18. 900
  19. 105
  20. 480
  21. 570
  22. 570
  23. 870
  24. 630
  25. 270
  26. 135
  27. 465
  28. 135
  29. 915
  30. 135
  31. 420
  32. 555
  33. 915
  34. 345
  35. 540
  36. 60
  37. 345
  38. 375
  39. 900
  40. 390

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