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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 152 · 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. 1.37 × 15 =
  2. 2.50 × 15 =
  3. 3.60 × 15 =
  4. 4.59 × 15 =
  5. 5.19 × 15 =
  6. 6.44 × 15 =
  7. 7.20 × 15 =
  8. 8.53 × 15 =
  9. 9.26 × 15 =
  10. 10.14 × 15 =
  11. 11.10 × 15 =
  12. 12.43 × 15 =
  13. 13.53 × 15 =
  14. 14.6 × 15 =
  15. 15.11 × 15 =
  16. 16.60 × 15 =
  17. 17.34 × 15 =
  18. 18.14 × 15 =
  19. 19.38 × 15 =
  20. 20.47 × 15 =
  21. 21.23 × 15 =
  22. 22.42 × 15 =
  23. 23.27 × 15 =
  24. 24.39 × 15 =
  25. 25.31 × 15 =
  26. 26.55 × 15 =
  27. 27.12 × 15 =
  28. 28.49 × 15 =
  29. 29.34 × 15 =
  30. 30.62 × 15 =
  31. 31.23 × 15 =
  32. 32.8 × 15 =
  33. 33.5 × 15 =
  34. 34.55 × 15 =
  35. 35.30 × 15 =
  36. 36.52 × 15 =
  37. 37.64 × 15 =
  38. 38.59 × 15 =
  39. 39.30 × 15 =
  40. 40.52 × 15 =

Answer key

  1. 555
  2. 750
  3. 900
  4. 885
  5. 285
  6. 660
  7. 300
  8. 795
  9. 390
  10. 210
  11. 150
  12. 645
  13. 795
  14. 90
  15. 165
  16. 900
  17. 510
  18. 210
  19. 570
  20. 705
  21. 345
  22. 630
  23. 405
  24. 585
  25. 465
  26. 825
  27. 180
  28. 735
  29. 510
  30. 930
  31. 345
  32. 120
  33. 75
  34. 825
  35. 450
  36. 780
  37. 960
  38. 885
  39. 450
  40. 780

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