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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 386 · 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. 1.60 × 15 =
  2. 2.60 × 15 =
  3. 3.54 × 15 =
  4. 4.63 × 15 =
  5. 5.44 × 15 =
  6. 6.37 × 15 =
  7. 7.39 × 15 =
  8. 8.30 × 15 =
  9. 9.60 × 15 =
  10. 10.4 × 15 =
  11. 11.61 × 15 =
  12. 12.41 × 15 =
  13. 13.36 × 15 =
  14. 14.51 × 15 =
  15. 15.11 × 15 =
  16. 16.58 × 15 =
  17. 17.58 × 15 =
  18. 18.41 × 15 =
  19. 19.48 × 15 =
  20. 20.46 × 15 =
  21. 21.42 × 15 =
  22. 22.5 × 15 =
  23. 23.61 × 15 =
  24. 24.9 × 15 =
  25. 25.30 × 15 =
  26. 26.62 × 15 =
  27. 27.26 × 15 =
  28. 28.7 × 15 =
  29. 29.20 × 15 =
  30. 30.24 × 15 =
  31. 31.19 × 15 =
  32. 32.50 × 15 =
  33. 33.56 × 15 =
  34. 34.48 × 15 =
  35. 35.27 × 15 =
  36. 36.7 × 15 =
  37. 37.27 × 15 =
  38. 38.37 × 15 =
  39. 39.33 × 15 =
  40. 40.4 × 15 =

Answer key

  1. 900
  2. 900
  3. 810
  4. 945
  5. 660
  6. 555
  7. 585
  8. 450
  9. 900
  10. 60
  11. 915
  12. 615
  13. 540
  14. 765
  15. 165
  16. 870
  17. 870
  18. 615
  19. 720
  20. 690
  21. 630
  22. 75
  23. 915
  24. 135
  25. 450
  26. 930
  27. 390
  28. 105
  29. 300
  30. 360
  31. 285
  32. 750
  33. 840
  34. 720
  35. 405
  36. 105
  37. 405
  38. 555
  39. 495
  40. 60

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