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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 519 · 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. 1.64 × 15 =
  2. 2.36 × 15 =
  3. 3.54 × 15 =
  4. 4.12 × 15 =
  5. 5.51 × 15 =
  6. 6.40 × 15 =
  7. 7.55 × 15 =
  8. 8.56 × 15 =
  9. 9.62 × 15 =
  10. 10.30 × 15 =
  11. 11.54 × 15 =
  12. 12.23 × 15 =
  13. 13.34 × 15 =
  14. 14.54 × 15 =
  15. 15.57 × 15 =
  16. 16.26 × 15 =
  17. 17.13 × 15 =
  18. 18.29 × 15 =
  19. 19.42 × 15 =
  20. 20.44 × 15 =
  21. 21.29 × 15 =
  22. 22.5 × 15 =
  23. 23.45 × 15 =
  24. 24.62 × 15 =
  25. 25.32 × 15 =
  26. 26.22 × 15 =
  27. 27.25 × 15 =
  28. 28.6 × 15 =
  29. 29.21 × 15 =
  30. 30.11 × 15 =
  31. 31.9 × 15 =
  32. 32.49 × 15 =
  33. 33.10 × 15 =
  34. 34.20 × 15 =
  35. 35.22 × 15 =
  36. 36.14 × 15 =
  37. 37.34 × 15 =
  38. 38.35 × 15 =
  39. 39.7 × 15 =
  40. 40.7 × 15 =

Answer key

  1. 960
  2. 540
  3. 810
  4. 180
  5. 765
  6. 600
  7. 825
  8. 840
  9. 930
  10. 450
  11. 810
  12. 345
  13. 510
  14. 810
  15. 855
  16. 390
  17. 195
  18. 435
  19. 630
  20. 660
  21. 435
  22. 75
  23. 675
  24. 930
  25. 480
  26. 330
  27. 375
  28. 90
  29. 315
  30. 165
  31. 135
  32. 735
  33. 150
  34. 300
  35. 330
  36. 210
  37. 510
  38. 525
  39. 105
  40. 105

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