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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 220 · 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. 1.59 × 15 =
  2. 2.23 × 15 =
  3. 3.9 × 15 =
  4. 4.4 × 15 =
  5. 5.43 × 15 =
  6. 6.22 × 15 =
  7. 7.9 × 15 =
  8. 8.30 × 15 =
  9. 9.13 × 15 =
  10. 10.57 × 15 =
  11. 11.46 × 15 =
  12. 12.21 × 15 =
  13. 13.8 × 15 =
  14. 14.45 × 15 =
  15. 15.40 × 15 =
  16. 16.22 × 15 =
  17. 17.11 × 15 =
  18. 18.27 × 15 =
  19. 19.45 × 15 =
  20. 20.53 × 15 =
  21. 21.8 × 15 =
  22. 22.16 × 15 =
  23. 23.5 × 15 =
  24. 24.9 × 15 =
  25. 25.62 × 15 =
  26. 26.27 × 15 =
  27. 27.30 × 15 =
  28. 28.47 × 15 =
  29. 29.22 × 15 =
  30. 30.32 × 15 =
  31. 31.14 × 15 =
  32. 32.10 × 15 =
  33. 33.26 × 15 =
  34. 34.49 × 15 =
  35. 35.10 × 15 =
  36. 36.11 × 15 =
  37. 37.12 × 15 =
  38. 38.7 × 15 =
  39. 39.62 × 15 =
  40. 40.50 × 15 =

Answer key

  1. 885
  2. 345
  3. 135
  4. 60
  5. 645
  6. 330
  7. 135
  8. 450
  9. 195
  10. 855
  11. 690
  12. 315
  13. 120
  14. 675
  15. 600
  16. 330
  17. 165
  18. 405
  19. 675
  20. 795
  21. 120
  22. 240
  23. 75
  24. 135
  25. 930
  26. 405
  27. 450
  28. 705
  29. 330
  30. 480
  31. 210
  32. 150
  33. 390
  34. 735
  35. 150
  36. 165
  37. 180
  38. 105
  39. 930
  40. 750

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