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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 630 · 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. 1.36 × 15 =
  2. 2.21 × 15 =
  3. 3.24 × 15 =
  4. 4.44 × 15 =
  5. 5.12 × 15 =
  6. 6.52 × 15 =
  7. 7.28 × 15 =
  8. 8.26 × 15 =
  9. 9.36 × 15 =
  10. 10.12 × 15 =
  11. 11.40 × 15 =
  12. 12.38 × 15 =
  13. 13.5 × 15 =
  14. 14.7 × 15 =
  15. 15.58 × 15 =
  16. 16.27 × 15 =
  17. 17.37 × 15 =
  18. 18.51 × 15 =
  19. 19.45 × 15 =
  20. 20.34 × 15 =
  21. 21.19 × 15 =
  22. 22.37 × 15 =
  23. 23.20 × 15 =
  24. 24.32 × 15 =
  25. 25.51 × 15 =
  26. 26.48 × 15 =
  27. 27.7 × 15 =
  28. 28.21 × 15 =
  29. 29.48 × 15 =
  30. 30.46 × 15 =
  31. 31.16 × 15 =
  32. 32.49 × 15 =
  33. 33.12 × 15 =
  34. 34.34 × 15 =
  35. 35.40 × 15 =
  36. 36.43 × 15 =
  37. 37.42 × 15 =
  38. 38.45 × 15 =
  39. 39.33 × 15 =
  40. 40.44 × 15 =

Answer key

  1. 540
  2. 315
  3. 360
  4. 660
  5. 180
  6. 780
  7. 420
  8. 390
  9. 540
  10. 180
  11. 600
  12. 570
  13. 75
  14. 105
  15. 870
  16. 405
  17. 555
  18. 765
  19. 675
  20. 510
  21. 285
  22. 555
  23. 300
  24. 480
  25. 765
  26. 720
  27. 105
  28. 315
  29. 720
  30. 690
  31. 240
  32. 735
  33. 180
  34. 510
  35. 600
  36. 645
  37. 630
  38. 675
  39. 495
  40. 660

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