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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 127 · 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. 1.38 × 15 =
  2. 2.13 × 15 =
  3. 3.6 × 15 =
  4. 4.60 × 15 =
  5. 5.17 × 15 =
  6. 6.48 × 15 =
  7. 7.8 × 15 =
  8. 8.29 × 15 =
  9. 9.49 × 15 =
  10. 10.54 × 15 =
  11. 11.26 × 15 =
  12. 12.56 × 15 =
  13. 13.20 × 15 =
  14. 14.29 × 15 =
  15. 15.61 × 15 =
  16. 16.38 × 15 =
  17. 17.39 × 15 =
  18. 18.23 × 15 =
  19. 19.8 × 15 =
  20. 20.59 × 15 =
  21. 21.27 × 15 =
  22. 22.61 × 15 =
  23. 23.37 × 15 =
  24. 24.49 × 15 =
  25. 25.6 × 15 =
  26. 26.24 × 15 =
  27. 27.31 × 15 =
  28. 28.61 × 15 =
  29. 29.27 × 15 =
  30. 30.18 × 15 =
  31. 31.43 × 15 =
  32. 32.37 × 15 =
  33. 33.21 × 15 =
  34. 34.20 × 15 =
  35. 35.40 × 15 =
  36. 36.33 × 15 =
  37. 37.27 × 15 =
  38. 38.59 × 15 =
  39. 39.8 × 15 =
  40. 40.16 × 15 =

Answer key

  1. 570
  2. 195
  3. 90
  4. 900
  5. 255
  6. 720
  7. 120
  8. 435
  9. 735
  10. 810
  11. 390
  12. 840
  13. 300
  14. 435
  15. 915
  16. 570
  17. 585
  18. 345
  19. 120
  20. 885
  21. 405
  22. 915
  23. 555
  24. 735
  25. 90
  26. 360
  27. 465
  28. 915
  29. 405
  30. 270
  31. 645
  32. 555
  33. 315
  34. 300
  35. 600
  36. 495
  37. 405
  38. 885
  39. 120
  40. 240

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