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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 377 · 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. 1.19 × 15 =
  2. 2.34 × 15 =
  3. 3.24 × 15 =
  4. 4.51 × 15 =
  5. 5.16 × 15 =
  6. 6.53 × 15 =
  7. 7.9 × 15 =
  8. 8.35 × 15 =
  9. 9.52 × 15 =
  10. 10.16 × 15 =
  11. 11.35 × 15 =
  12. 12.51 × 15 =
  13. 13.57 × 15 =
  14. 14.61 × 15 =
  15. 15.13 × 15 =
  16. 16.46 × 15 =
  17. 17.64 × 15 =
  18. 18.33 × 15 =
  19. 19.45 × 15 =
  20. 20.54 × 15 =
  21. 21.4 × 15 =
  22. 22.14 × 15 =
  23. 23.27 × 15 =
  24. 24.17 × 15 =
  25. 25.48 × 15 =
  26. 26.56 × 15 =
  27. 27.22 × 15 =
  28. 28.33 × 15 =
  29. 29.37 × 15 =
  30. 30.26 × 15 =
  31. 31.18 × 15 =
  32. 32.12 × 15 =
  33. 33.27 × 15 =
  34. 34.30 × 15 =
  35. 35.6 × 15 =
  36. 36.6 × 15 =
  37. 37.37 × 15 =
  38. 38.61 × 15 =
  39. 39.5 × 15 =
  40. 40.5 × 15 =

Answer key

  1. 285
  2. 510
  3. 360
  4. 765
  5. 240
  6. 795
  7. 135
  8. 525
  9. 780
  10. 240
  11. 525
  12. 765
  13. 855
  14. 915
  15. 195
  16. 690
  17. 960
  18. 495
  19. 675
  20. 810
  21. 60
  22. 210
  23. 405
  24. 255
  25. 720
  26. 840
  27. 330
  28. 495
  29. 555
  30. 390
  31. 270
  32. 180
  33. 405
  34. 450
  35. 90
  36. 90
  37. 555
  38. 915
  39. 75
  40. 75

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